THE CHEMICAL INDUSTRY AND ENGINEERING EXHIBITION.
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The second international Chemical Industry and Engineering Exhibition, with which was incorporated the first Foundry Trades Exhibition, was held in the Royal Agricultural Hall, from the 14th to the 28th ult., and, although the attendance throughout was rather on the low side, it is, generallyaekuowlodged and recognized by exhibitors and others concerned that the Exhibition was a complete success. There was nothing to attract the general outside public, and those who did attend were keenly interested from the professional or business point of view.
Apart from the numerous foundry exhibits, including auto-, matie moulding machines, co-se drying ovens and apparatus' of a similar nature, there was a varied and highly-interesting calkotion of scientific instruments, such as are in daily use in the laboratories and test-houses of motor factories. These included a most beautiful microenstallograph, designed fur the making of visual observations, as well as photomicrographic analysis of prepared specimens of metals. This was shown on the stand of E. Leitz, of 18, Bloomsbury Square, W.C. ; whilst. eamples of the most up-to-date equipment for testing ails and analysing gases and metals were shown on the stands of Towiison and Mercer, Ltd., of 34, Camomile Street, E.C. ; Dring and }'age, 56, Stamford Street, S.E. ; and Brady and Martin, Ltd., of Newcastle-on-Tyne. Dr. Sodeau's improved apparatus for accurate gas medy'sis, as used in the Natioual Physical Laboratory, was shown complete with all the necessary pipettes and other accessories on the last-named stand. Fletcher, Russell and Co., Ltd., of the Palatine Works, Warrington, which company will be well-known to readers of this journal because of its excellent gas and oil case-hardening furnaces, IntlilleS, brazing hearths, etc., which have been dealt with in numerous articles in this journal, also showed a selection of apparatus, such as blowers, muffles, etc., suitable for teat-house and laboratory equipment.
A stand of more than usual interest to commercial-vehicle ownerewas that of Carhie, Ltd., of 27, Cannon Street, KC, on which stand a number of improved-pattern acetylene generators, both for lighting and cxy-acetylene welding were displayed. The Carbie system of lighting is one that has been very largely adopted by the London General Omnibus Co., and it, is undoubtedly one of the.. most efficient and cleanly acetylene apparatus.at present upon the market, and the company's officialivspeak most highly of its behaviour in use. In these apparatus. the gas is generated from carbide which is specially compressed into cylindrical cakes of various sizes, to suit the different sizes of generators; by the special compressing, eix,n'y particle. of the carbide is rendered impervious to atmospherie moisture, and is susceptible only to the action of water in liquid form, so that the generation of gas only takes place while the water is in actual contact with the cake. The gas is produced slowly and evenly, white the generating point, which is at all times entirely surrounded by water, ensures a cool and practically pure gas, which, alter passing through a special chemical purifier, incorporated in the generator, makes it particularly suitabie for both welding and lighting purposes. The operation is esetremeiy simple, and the complete absent* of " after generation " permits of manufacture in very compact form. It is one of the least -olliectionable from the point of view of odour of any of the aeetylene systems of generation. These generators are marlsup in sizes for motor vehicles to suit either a small pleasureevar or a large doubledecked omnibus with a large number of lights. We are of opinion that if motor:an owners would consider the question of lighting more carefully and make wider adoption of the use of illuminated signs and announcements, (4 their business wares, they would obtain from their. machines a. very high return from the advertisement. remit of view.