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EXHIBITS AT THE ROADS RANSPORT EXHIBITION.

Tri TIE fifth Public Works, Roads and Transport Con

gress and Exhibition opened at the Agricultural Hall, London, on Thursday, and will continue until Thursday evening next. The first Congress and Exhibition was held in 1915, with the intention that it should be repeated biennially, but the circumstances of the period did not justify the 1917 gathering, and not until 1919 was the second one held. Since then the Congress has been called together and the/Exhibition promoted at every alternate year. Considerable progress has been observed after each interval, and this year's development may be measured by the fact that no fewer than 1,300 delegates from 720 local authorities are present, in addition to a number representing overseas and foreign municipalities. These figures are virtually double the figures for the 1923 conferences. The importance of the conferences and discussions may be gathered from the fact that the Government is giving its support through Departmental officials, that the delegates of the local authorities consist of members of those authorities and the leading officials, and that such representative bodies as the British Waterworks Association, the Institution of Gas Engineers, the Incorporated Municipal Electrical Association, the Institute of Cleansing Superintendents, the Association of Managers of Sewage Disposal Works, the County Land Agents Association, the Institution of Municipal and County Engineers, and others are taking an extremely active part.

The Exhibition, again, shows distinct advance, except in the matter of road transport, for reasons which are, of course, well known, for it is not the policy of the Society of Motor Manufacturers and Traders to support exhibitions or shows which are not held under its banner. The members of the Society are the best judges as to whether it is or is not worth while displaying their products to such a representative gathering as that to which we have referred. Thus, there are but few motor vehicles and tractors in the Show, the other chief exhibits that come within our purview being rollers of all kinds, tipping appliances, sweepers, street watering and washing appliances, road making and surface dressing implements, etc. The Exhibition is Well organized, the exhibits /ire well staged in a good light, and we have ourselves found much of interest.

Advance Steam Rollers. Stand 70.

Wallis and Steevens, Ltd., Basingstoke., TWO rollers of 6-ton and 10-ton capacity respectively and a separate back-axle unit comprise the exhibits shown by this company.

The Advance rollers, as they are called, were brought out not very long ago, and constitute a decided step in the right direction. It is claimed for them—and, we believe, with justification—that the special features embodied in their design give central and even consolidation of road materials without spreading or corrugating. At the same time, they give automatic cambering and extremely rapid reverse.

The 10-tonner is equipped with a patent two-tine double scarifier, which can be used at each side with

out turning tne machine. This scantier is carried direct on the horn plates through the medium of a massive round shaft with squared ends, and the tines can be dropped or lifted from the cab.

In etich roller the weight per sq. in. of tread is evenly balanced between the front and rear rolls, and the overtype engine is most carefully balanced.

A leading feature of both rollers is the special type of rear axle in which each half of the axle forms a rocking beam, on. one side of which is carried the wheel, whilst the other side is balanced by a powerful compression spring ; actually, one spring does for both halves, and the strength of this spring can be adjusted by two nuts in the centre of the axle casing, and the axle can, if required, be made rigid. The nuts are locked by a swing stirrup, and each joint is oiled from a siphon lubricator. Another good point in the design is that the front roll fork can be rigidly locked to prevent side rocking, whilst permitting free steering.

Armstrong-Whitworth Rollers. Stand 58,

Sir W. G. Armstrong-Whitworth and Co., Ltd., Openshaw Works, Manchester.

THE latest of the two machines shown by this company for rolling work is the quick-reverse tandem type of 6-7 tons weight for rolling bitumen surfaces. This machine is exceptional in that it has a differential

embodied in the drive to the divided roil at the rear, so that there is no drag on this roll when steering. Rucking of the surfaces does not occur and steering is facilitated.

Further, to assist the steering, however, this can be effected by hand, or the steering wheel can be transferred to a second short column, and in this position the steering is effected mechanically through clutches operated from the engine. The last-named has double H.P. cylinders, whilst the boiler is of the loco type carried forward above the fork of the front roll.

The appearance of this machine has caused certain people not cognizant with its excellent features to believe that it is top-heavy ; but, actually, the centre of gravity of the whole roller is at the level of the bottom Of the channel frame carrying the boiler, and the whole machine has a very large angle of stability.

The other machine is a standard 10-ton three-roll type of 10 tons weight, equipped with a rigid Arm

strong-Whitworth three-tine scarifier. A feature of this instrument is that it can plane in. off the road, an almost impossible feat if the scarifier be at all flexible. Road engineers will quite realize that it is a comparatively simple matter to scarify to a depth of, say, 2 ins.

Both these rollers possess features which place them in the first rank. The gearing is machine-cut throughout, even as regards the spur rings on the rolls. The crankshaft spur pinion is a forging, cut and hardened. Failures of the front fork have sometimes occurred in rollers of other makes. To avoid this, a cast-steel fork Is employed. The roller centres are steel discs ; furthermore, the front saddle has been strengthened by making it of H section.

The firebox is of the Belpaire type and the engine Is equipped with piston valves.

Aveling and Porter Rollers. Stand 56.

Aveling and Porter, Ltd., Rochester.

THE latest-type roller amongst the three shown by this well-known company is the quick-reverse tandem type built for bituminous carpeting and tar macadam. The engine has two H.P. cylinders and a double-throw crankshaft with the crank set at 90 degrees. The special valve gear, operated by a single lever, gives a perfectly smooth and instantaneous reverse, a most necessary qualification when cross-rolling hot, plastic material. The boiler is of the vertical type, situated at the off side and mounted on frame cross-members.

The main frame is of rolled channel steel, and the rear roller is carried on an axle secured in brackets bolted to the tops of the side-members, whilst the bracket for the front fork is made of forged-steel plate firmly secured to the frame. On this are mounted all the controls, the three-cylindered radial engine, which is employed for steering to permit rapid manceuvring of the roller, and the driver's seat.

The other two machines are a single-cylinder roller of the A type, having a piston-valve engine, a Belpairetype loco boiler and east-steel gearing with the first and second-motion pinions machine-cut.

The third roller is of the compound type. It weighs 10 tons against the 8 tons of that just described, and is provided at one side with a scarifier and at the other with a particularly useful type of appliance known as the Price verge cutter, which proves most effective in digging out the channels at the side of the road without extraneous assistance.

Barford and Perkins Rollers. Stand 62.

Barford and Perkins, Ltd., Peterborough.

LOOMING large on this stand is the 12-14-ton T.W.K.-type three-roll roller with petrol or paraffin engine and water-ballasted wheels, a feature which, as a matter of fact, applies to all the roller products of the company.

This machine is equipped with a four-cylinder engine of 40 b.h.p., the gearbox providing three speeds forward and two reverse, and a fuel-storage tank which can carry more than a full week's supply,

A scarifier can be fitted, and the machine shown is equipped with one of Aveling and Porter make.

For, asphalt and other compounds requiring a quickreversing type, there is the latest pattern Q-type 6-tonner, in which instantaneous reverse is obtained by the employment of double plate clutches, whilst steering is facilitated by the use of a simple and efficient power device.

Another tandem type is the 8-10-tonner, especially adapted for road-making in partially developed countries, also for tar macadam and patching work. It provides two speeds in either direction, a plate clutch giving exceptionally smooth starting and reversing.

In the smaller category is the A4 two-speed tandem machine for light work, such as paths and for racecourses. This machine can also be provided with a quick-reverse gear.

Lastly, there is the 11-ton A-type machine with three rolls which can be changed to a-ive rolling widths from 4 ft. to 6 ft., thus making it suitable either for paths or grass.

Eagle Trailer. Gallery.

Eagle Engineering Co., Ltd., Warwick.

THE Eagle tipping trailer exhibited is a special type designed to meet the needs of municipalities and for use in conjunction with trailers, such as the Fordson, McCormick-Deering, etc.

The body is of the refuse-collecting type, with sanitary steel covers hinged along the centre line and provided with tension springs so arranged that immediately the automatic catch of each cover is released the cover flies open and remains open until it is pulled down by hand" and automatically locked. The tailboard is also hinged at the top and a vertical telescopic screw tipping gear of the hand-operated variety is fitted. A small caster wheel at the front end is carried on a swivel bracket, which also holds the ball pin by which the trailer is connected to the tractor. Two stout coil compression springs provide flexibility for the connection. The frame is triangulated and built of rolled channel steel and all the wheels are rubber-tyred, those at the rear being twins.

Fageol Motor Coach. Stand 110.

Warwick Wright, Ltd., 150, Bond Street London, W.I.

WHAT is, we believe, the only passenger vehicle in the Exhibition is a splendid example staged by this company and known as the Fageo safety coach. This vehicle has been designed particularly for the British market, and it incorporates those features which have Shown. themselves to be essential to public safety, including a folding door at the near side controlled by a lever handily situated to the driver's left hand, whilst at the rear is an easily operated emergency door with a detachable seat in front of it. • The floor level has been kept very low, being approximately 2 ft. 1 in. from the ground, although, of course, the step makes the first rise from the ground much less _ than this. The model is also equipped with two independently operated brakes.

The windscreen is permanently shut, but at the side are narrow ventilating windows hinged vertically, whilst drop windows are provided all round. For the con venience of standing passengers there are roof rails with. sliding straphangers having celluloid grips. Four protecting bars run along the outsides of the windows.

So far as the seating is concerned, seven pairs of seats face forward, one pair faces to the off side and is situated at the right of the entrance, whilst five seats at the back and two sets of four facing each other form a kind of sociable compartment.

Further riding comfort is afforded by the use of special springs, having supplementary leaves of a different camber underneath them and rubber cushions at the ends of these springs.

A spring-steel bumper is fitted at the front, and the headlamps aretarried by pressed-steel brackets riveted to the front wings. Steel-disc wheels are employed all round, and the spare Wheel N carried at the off side behind the front wing.

Foden 10-ton Tractor. Stand 136.

Fodens, Ltd., Sandbach, Cheshire.

THE solitary exhibit consists of a 10-ton tractor. This, of course, has an overtype engine with an horizontal locomotive-type multi-tubular boiler having an effective heating surface of 90 sq. ft. Two speeds give four and eight" miles per hour respectively, the engine being of the compound type having steel-jacketed cylinders. From the final shaft to the rear axle transmission• is by 21-in. pitch roller chain to the enclosed differential mounted on the rear axle. On the near side of the axle is a winding drum having 50 yds. of steel rope, and large internal-expanding brakes operate in the rear-wheel drums in addition to a band brake. Front springing is of the transverse semi-elliptic type, and there are radius rods from the tubular axle to the front of the firebox.

Steering is of the Ackerman type controlled by a wheel on the near side of the vehicle. The driver sits beside the chassis frame-member, and has under his control all the levers for regulating, reversing and braking. Rubber tyres are fitted, 180 mm. by 771 rum. on the front and 180 mm. by 1,194 ram. twins on the rear wheels. The trailer brake is controlled by a wheel on the right-hand side of the tractor, and the 280-gallon water tank placed over the rear axle gives the necessary wheel adhesion for heavy haulage purposes. The coal bunker is in the driver's cab between the framemembers, and gives a range of 60 miles' travelling.

Fordson Adaptations. Stand 129.

Muir-Hill Service Equipment, Ltd., Ashburton Road, Trafford Park, Manchester.

ON the stand occupied by this concern is a wide range of conversions of the familiar Fordson tractor, described as Industrial Fordsons.

'A combined loading shovel, crane and winch is one most interesting exhibit. The jib section is, of course, fitted to the front of the tractor, which has twin-tyred wheels to prevent sinking under load. On the off side of the tractor, running in an oilbath, is a box containing the multi-plate clutch and band brake. A safety trip is fitted to the winding gear to prevent breaking the cable or mechanism. With a 6-ft. 3-in. jib, digging can be carried on 6 ins, below the ground level and the soil carried to the full height of the jib for ldrry loading. The patent Muir-Hill cleated wheels are fitted on the crane outfit, and provide certain traction over every type of surface. Normally, the rubber tyres are in operation.

Other exhibits are a standard Fordson with endtipping trailer and a rail loco, in which is incorporated a patent non-clash gearbox, claimed to be entirely foolproof.

Foster Wellington Steam Tractor. Stand 19.

William Foster. and Co., Ltd., Lincoln.

THE rubber-tyred Wellington model steam tractor Is a handsome exhibit bearing on its smokebox door the familiar " Tank " mark of its makers. Steering is on the chain system, and there is a radius rod from the front axle to the front of the firebox. The engine is of the two-cylinder compound type bolted to a planed-steel seating riveted to the boiler. Doubleported slide valves are used, and the motion is of the Stephenson link type. At each side of the crossheadgear are removable covers. Two gears are provided, giving speeds of approximately 3 m.p.h. and 6 m.p.h., and control is by two levers.

A powerful winding drum is mounted on the rear axle, equipped with 50 yds. of steel wire rope, which can be paid out while the tractor is standing or travelling. The tender has a water tank with a capacity of 80 gallons and a 31-cwt. coal bunker. In addition, there are wing tanks, one on each side of the boiler, giving an 18-mile journey capacity.

Fowler-Woods Road-surfacing Machine Stand 30.

John Fowler and Co. (Leeds), Ltd., Steam Plough and Locomotive Lorries, Leeds.

TWO outstanding exhibits on the Fowler stand of Interest to readers of this journal are the three-way 1336 tipping steam wagon and the Fowler-Wood's steamrolling and tar-spraying engine.

Dealing With the wagon in the first case, this is destined for the Newbury Rural District Council, and has a load capacity of 6 tons to 7 tons. The boiler is of the vertical fire-tube type, fed from the top, and transmission is by en-closed propeller shaft to an overhead-worm-driven pot-type axle. A compound engine is used in conjunction with a three-speed gear. Steering is on the Ackerman principle, the wheel being to the right of the boiler, the steering box being fitted at the forward extremity of the off-side chassis member. The body can i-e tipped in three directions by means of the Bromilow and Edwards hydraulic gear.

Capable of performing the majority of operations in resurfacing the modern road is the Fowler-Wood's rolling and tar-spraying machine. This consists of a D.N.-type steam roller having a compound engine. At the rear of the machine there are the spraying pipe and nozzles, and a hand-spraying apparatus is fitted on the near side, enabling finishing jobs to be effected while the roller is in motion. The tar-carrying tank is on the near side of the vehicle and the pump is chain-driven from the engine flywheel.

Glossdp's Tar Sprayer. Stand 2,

W. J. Glossop, Hipperholme, Halifax.

THE work of tar spraying is brought ahnost to a fine art when the appliances made by this firm are employed. The special spraying apparatus shown on their stand is fitted on a 6-ton Atkinson Unifiow wagon having a large water tank, sufficient to allow for long working without refilling.

This machine has a spraying capacity of 6,000 sq. yds. per hour, and it not only fills its own tar from a railway tank wagon, but also heats and sprays it. Where the material is handy, 25,000 sq. yds. to 30,000 sq. yds. can be covered per day, this requiring five tank loa,ds. The spraying jets are effectually protected so that the tar cannot be blown on to pedestrians ; it can thus be used safely in towns.

A patent feature is the automatic control for the height of the spraying jets, the settling of the vehicle on its springs under load not affecting the jets in any manner.

Holland-S.L.M. Compressor Plant. Stand 3.

Bernard Holland and Co., 17, Victoria Street, London, S.W.1.

ON this stand is staged a 6-ton Berna lorry of recent pattern, which carries a very fully equipped air-compressing plant manufactured by the Swiss Locomotive Works, the delivery being 180 cubic ft. per min., and the compressor being driven by the lorry engine through an additional gear.

Lacre Sweepers and Lorry. Stand 55.

Lacre Motor Car CO., Ltd., 78, York Road, London, N.1.

THERE are three exhibits on this stand, two being three-wheeled sweepers, one an L type and the other a small model built particularly for employment in con7

fined spaces, such as garages, and it is interesting to note that 12 of these small machines are now employed by the London General Omnibus Co., Ltd., although that shown is for Thomas Tilling, Ltd. The third exhibit is a 2-2i-ton model 0 Lacre chassis, equipped with a combined hand-and-gravity operated tipping body having hinged detachable sides and similar extension sides, whilst the tailboard proper is hinged to the top and . bottom and has, in the case of the sides, an extension piece at the top which is also hinged.

The L-type sweeper is too well known to require a detailed description. It has proved highly successful in practice and has halved the sweeping costs in some towns, such as Middlesbrough, whilst even greater reductions have been obtained elsewhere; at Stockton-onTees, for instance, the horse brushes cost 6s. 6d. per mile of street swept, and the Lacre broom 2s, ld. per mile.

The small sweeper shown is an experimental type equipped with an oil-cooled Belsize-Bradshaw engine, and, of course, has no radiator; but the production model has a four-cylindered Dorman water-cooled power unit. Al! the driving is done by the single rear wheel which is carried by two quarter-elliptic springs ; the same type of spring is employed for the front axle.

McCormick-Deering Tractor. Stand 114,

International Harvester Co., of Great Britain, Ltd., 80, Finsbury Pavement, London, E.C.

A USEFUL type of road tractor, which has already been -described in detail in the columns of this journal, will be fOund here, where it is shown in conjunction with an H.B. tipping trailer of the two-wheel type, which tips if the brake be applied and the tractor reversed, providing the body be released.

The tractor is of 28.9 h.p. and is equipped with a patent quick-release drawbar coupling. Goodyear tyres, 40 ins. by 5 ins. at the rear and 27 ins. by 3.31 ins. at the front, are fitted. The front axle is centrally pivoted, but, being secured to the main frame by radius rods, is only permitted to rock, and the steering is of the Ackerman type. Novelty is shown in the front springing; there being four coil springs behind the frame proper and the fulcrum bracket of the axle.

Features of the tractor are the Pomona air cleaner, the large internally expanding brakes in the rear wheels, and the band brake controlled by a hand lever and acting on the transmission. The whole of the gearing is enclosed in the case, which also forms the frame, and three forward speeds and a reverse are provided.

Mannesman Muk Lorry. Stand 122.

Mannesman Motor Lorries, Co., 7, Queen Anne's Chambers, Westminster, London, S.W.1.

NOVELTY in design is one of the outstanding features of the Mannesman tipping vehicle, which is of German origin, and known by the none-too-pretty name of " Muk." The four-cylinder engine has two blocks of cylinders cast in pairs, the dynamo and magneto being in tandem on the near side of the engine and the carburetter on the off side. The cylinders are of the T-headed type and cooling is by pump and fan. A triple -buffer bar is located in front of the radiator ; an interesting feature is the provision of lifting eyes on the crankcase to facilitate overhaul work.

The chassis is essentially substantial, and the wheels are extraordinarily solid in construction, bearing single frdrht and twin rear solid tyres. The front springs have, at each end, dashpots operating through bellcrank levers, but, in the case of the rear springs, ordin

ary mounting is employed. The front springs are underslung and the axle is doi,vnswept to clear the crankcase. Under the chassis frame are spring-loaded tie rods. Final drive is bychain, and there is a springloaded trailer towing hook in addition to the four hooks on the frame for towing purposes.

Tipping Is controlled by levers in the driver's cab, and the drive for the screwed bar is taken from the gearbox by a universally jointed shaft. Foolproofness is one of the outstanding features of the tipping. The body can be tilted in three directions, and a sprag is fitted to the rear axle, also controlled from the cab.

Mashall Rollers. Stand 61.

Marshall, Sons and Co., Ltd., Gainsborough.

PROMINENT amongst the exhibits here is the new Universal-type steam road roller, which, It Is claimed, possesses the operating advantages of the standard three-roll and tandem-type machines, being equally suitable for consolidating road bottoms or for laying surfacings. Its quickly reversible engine enables the latter work to be done without producing corrugations, whilst the articulated back axle enables the rollers to be set • to finish road surfaces to any pre-determined camber. A. patent automatic lock prevents rocking motion on the front fork whilst !ant interfering with the steering. Operation of the steering gear is effected by a handwheel or an auxiliary steam-steering engine with three cylinders arranged radially ; the latter has automatic controls to prevent overrunning the quadrant.

The power unit is a double H.P. engine, entirely enclosed and splash-lubricated, and there is not the slightest dwell when the direction of travel is changed. The tandem effect is given by allowing an ample lap of the hind rolls over the track of those at the 'front.

Positioning the scarifier at either side of the roller is facilitated by the open-back driving platform, so that in narrow places it is unnecessary to turn the engine.

Two speeds are provided and a four-pinion compensating gear is embodied in the driN;e.

Another interesting exhibit is the Millars-Marshall tandem roller, specially designed for laying bituminous and similar road surfacings. This machine also has hand and power-steering gear. The boiler is of the vertical type and the design ensures an exceptionally low centre of gravity, thus avoiding undesirable rock ing. '

Mexphalte Bitumens. Stand 49.

Shell-IVIex, Ltd., Shell Corner, London, W.C.2.

"MOST attractive" is the general consensus of opinion regarding the fitting up of this stand. In the foreground is a pond, the edges of which are formed from blocks of Mexphaite, this pond being stocked with goldfish and surrounded by plants to prove that the Mexplialte series of bitumens are absolutely harmless to fish or plant life.

At the back of the stand is a striking set piece showing the course taken by and the treatment of Mexphalte road dressings from the time they leave the ship until they reach the site of road construction. The many Scammell tractor-tank lorries, in which the bitumen is carried, are represented by models.

Millar'sTructractor. Stand 63.

Millars Machinery Co., Ltd., Pinner's Hall, Great Winchester Street, London, E.C.2.

ONE of the interesting exhibits on this stand is the Tructractor. This is a neat little three-wheeled machine having two wheels at the front and one behind,

the rear one being carried on a vertical pivot and providing the means for steering, being connected by a ball-jointed rod to a steering gear of normal type.

At the front of this machine is a skip constructed of steel and having a capacity of 30 cubic ft. The driver can release this skip without descending from his seat, and it tips automatically under load and returns automatically by its own weight, a trigger gear locking it in its normal position. Towing hooks are provided at each end, and the machine will haul 15 tons along the level and carry its own load up gradients of 15 per cent.

Morris 1-ton Lorry and Wagon. Stand 4.

Tomlinson (Marylebone), Ltd., 2, FinchIey Road, St. John's Wood, London, N.W.S.

HERE are to be found three 1-ton Morris vehicles, one being a chassis, another an end-tipping wagon, and the third a timber lorry.

Dealing with the three chassis, which are similar in all instances, each has a four-cylinder engine of 14-28 h.p. The cylinder block is integral with the top half of the crankcase and a three-bearing crankshaft is fitted. The engine and gearbox form a unit., The cylinder head is detachable and the valves are located side

by side. Transmission is by propeller shaft enclosed in a torque tube to an overhead-worm-driven axle. Brake shoes are located side by side in the 15-in, rearwheel drums. Semi-elliptic springs are fitted all round and single straight-sided pneumatic tyres are standardized. Grease-gun lubrication is employed throughout.

The 1-ton end-tipping vehicle is of the hand-operated type and the body sides are hinged. The cab is fitted with a two-piece windscreen and the driver's comfort has been carefully considered.

Intended for the transport of timber is a body closely resembling the familiar ton lorry, but the width of the goods compartment is greater than that of the cab, and the front portions of the body are cut away to allow long poles to project on each side of the driver's cab, the centre part, of course, being used for shorter timber. Where there is no necessity to handle exceptionally long material, this type of vehicle should find a ready market. It can, of course, be used as an ordinary tanner for other loads.

Permac Compressor Tractor. Gallery.

Perkins Macintosh Petroleum Tool and Boring Co., Ltd., 25, Bishopsgate, London, E.C.2.

THIS company are showing an interesting conversion of the Fordson tractor, which is equipped with a supplementary frame, built of rolled channel steel, which carries at the front end an air tank fitted with compression gauges, etc., and at the rear a Permac air compressor. The drive to the compressor is through a Morse silent chain ,enclosed in an on-bath, the chain sprocket replacing the belt-driving pulley of the Fordson.

Robey Rollers and Steam Wagon. Stand 73.

Robey and Co., Ltd., Lincoln, AMONGST the three exhibits on this stand, that of greatest interest, because it is an entirety new product, is the patent Robey Clear-side tandem roller. It is a small machine, weighing, in working order, 21-3 tons. it is for road or patinvork, mad, as its name implies, one side—the near—is absolutely clear, so that it can roll right up to walled edges, etc.

It is a petrol-driven machine with a four-cylinder engine of 12 h.p. mounted crosswise, with n radiator at the off side, being carried on extension plates cast in one with the main bracket farming the fork support. A second casting forms the gearbox and the support for the stub axle carrying the rear roll. This, of course, provides an overhanging bearing, but, as the roll fork is pivoted, the stresses imposed upon the stub axle are not great; also, the weight is practically centralized. The steering wheel is in the usual car position and operates through a worm and quadrant.

Gearing is employed for the two speeds, with a silent chain for the reverse only. Changes are effected through dog clutches, and the final drive is through a cast-steel renewable gear ring in the rear roll, all the parts being totally enclosed. A small lever operates the change-speed gear and a long one the reverse. A triple roll at the front facilitates steering, and the overall width of each roll is 3 ft.

Next amongst the exhibits is a tandem steam roller weighing 7 tons 10 cwt. This has a straight, inclined rolled channel frame surrounding a loco boiler, on which is mounted a two-cylinder compound piston-valve engine working at 25O-Ib. pressure. Quick reverse is given by Stephenson link motion.

Finally, there is a 6-ton three-way tipping wagon with a nickel-steel frank tapered to the front and rear, and single-chain drive to an enclosed differential on the rear axle. Steering is effected, first, through a bevel gear, and then by worm and sector, the axle being centrally pivoted. Steering shock is taken by two heavy compression springs.

Ruston-Hornsby Crane-navvy. Stand 66.

Ruston and Hornsby, Ltd., Skeaf Ironworks, Lincoln.

AN interesting and original type of appliance is the Ruston crane-navvy, which is used in many cases on construction work in connection with new arterial roads. Steam is the motive power and there are separate engines for the winch, for sIewingand for racking the bucket. Dealing first with the chassis, as it may be termed, this consists of a chain-track-carrying frame, on which are mounted the crane platform, boiler engine and jib. Drive is taken through the centre post to a chain and thence to the front axle, connection to each track being by means of dog clutches, which are freed one at a time for steering purposes, a sprag pin being also provided, which can be dropped into recesses in the track plates when it is desired to stop rotation. The speed on the road is about mile per hour. Plain bearings are used on the steel track-supporting rollers.

Seven-eighths of a cubic yard of material can be lifted at a time in the bucket, which has teeth at its forward ,edge capable of withstanding a strain of six tons. A dual arm bears the bucket and is pivoted on to the jib, raising, of ColITSP!, being by means of the winch operating through a block and tackle. The boiler is of the vertical type, and is covered by an awning which also protects the operators.

S. D. Freighter. Stand 107.

Shelvoke and Drewry, Ltd., New Icknield Way, Letchworth, Herts.

PROBABLY the two principal exhibits of interest to visitors on the stand of this concern are the hydraulic tipper and the dust cart. The low loadingline is, of course, one of the features of the S.D. Freighter, which has a 2-ton capacity exclusive of the body. The net weight of the vehicle is 1 ton 16 cwt.,

and it is propelled by a 13.2 h.p. engine, water-cooled and having a three-bearing crankshaft lubricated under pressure. The radiator is mounted on the near side and the welded-steel fuel tank holds 5 gallons. The S.D. gearbox gives three speeds in each direction. Gear-change, brakes and clutches are all operated by one handle, which, of course, is an advantageous feature in handling a vehicle in town; the principal role of the S.D. Freighter is urban work. Steering is by geared tiller and final drive is of the overhead-worm type. Hydraulic tipping gear is employed, pressure being supplied by a pump integral with the gearbox. The ram propels the body backwards against stops, thus causing it to lift, and gives a tipping angle of 50 degrees, attained in 45 secs.

A similar chassis carries the dust cart, which has a 10-gauge steel body on an angle frame and a capacity of 6 cubic yds. The tailboard is hinged and the top is closed in by six waterproof canvas shutters stretched on a ridge pole. The tipping gear is again of the hydraulic type. The low-Loading line of the S.D. has proved a valuable feature for refuse collection owing to the saving of labour in lifting dustbins to the height of the ordinary vehicle, which involves excessive human effort and waste of time. A feature of the body is that it is wider at the back than the front.

Tuke and Bell Tipper and Sweeper. Stand 33.

Take and Bell, Ltd., Carlton Engineering Works, Lichfield, Staffs.

TWO exhibits constitute the display of this company. One is a dual-purpose lorry body mounted on a 1-ton Morris chassis, and the other is a new sweeping attachment. In view of its novelty we will treat with the latter first.

This appliance should find a ready sale amongst councils and other bodies who have need for a small machine to deal with a number of streets which is not sufficient, however, to justify the purchase of a singlepurpose motor machine. The vehicle is of the trailer type, having two rubber-tyrul wheels and a spring drawbar at the front end of the angle-section frame. Mounted over the wheels is a 70-gallon sprinkling tank with two nozzles, which precede the broom. The lastnamed component is of the two-piece type, driven by chain and shaft from the axle of the trailer, control being by clutch, cable-operated from the towing vehicle.

Turning now to the dual-purpose lorry body, this is intended for general haulage work or for house-to-house refuse collection. Gravity tipping is employed. All that is necessary is to place the handle in position, and on turning it the body moves backwards, ramps fixed to the body sliding up over the wheels, thus giving the necessary inclination and upsetting the normal balance, which causes one portion of the load to tip the remainder. Pegs on the front of the body register with recesses in the back of the cab, thus preventing movement when travelling. Detachable sliding tops cover the body to prevent refuse blowing about. The upper halves of each side are hinged, and the tailboard is provided with an automatic catch to prevent damage when tipping. The angle of discharge is 45 degrees. Screw-shaft and link mechanism are used to control the body and the final motion when tipping.

Walker Electric Vehicles. Stand 6..

Walker Vehicles, Ltd., 57, Kingsway, London, W.C.

THE chief exhibit on this stand is a heavy type of Walker electric vehicle, the lorry body of which is, to outward appearance, filled with a large load of timber ; but, actually, this merely forms the outer shell of an office, where full information regarding these vehicles and Walker electric tractors can be obtained.

It will be remembered that these vehicles and tractors are equipped with a special type of balanced drive, consisting of a central pinion meshing with the two large spur gears carried on a spider, these in turn meshingwith internal gear rings in the wheels.