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New Russian Porous POROUS glass for building Glass as Material for I purposes has been devel Building taped in the U.S.S.R., and
factories for producing this material are being erected in three cities. It is claimed that it can be machined as easily as wood, is lighter than water, chemically stable, can be dyed, and is stronger than brick. It may be used extensively, especially in the Arctic, for it is said that no other material can so effectively keep houses warm.
How Welding Can THE Willow Run plant of the Save Weight and Ford Motor Company
Cost saved 125 man-hours per aero plane on 100 assemblies of the B.24 bombers by using batteries of spotseamand roll-welding machines. Many of the employees started spot welding on their first day on the job. Considerable weight is saved, and the cost is halved. Aluminium and magnesium alloys and stainless steel are concerned in the development.
Light POlarization A N anti-dazzle device for Applied to Motor "motor vehicles is the subWindscreens . . . ject of a recent patent, No.
571,933, by G. Beaton and Son, Ltd., the well-known maker of windscreens. It consists of superimposed plates of light-polarizing material mounted in a suitable framework for relative rotation about an axis normal to the plane of the plates. These plates can be mounted on the windscreen In one position, when the polarization corresponds in direction in both, the whole of the incoming light is passed; by relative rotation, polarization becomes no longer parallel, and less light passes, thereby reducing glare until, when the lines of polarization are at right angles; virtually all light is excluded. How to Make One "CM." Go a Long THERE are many hundreds of foremen, road-test per sonnel, and ordinary drivers Way . who, as the result of not being able to obtain a copy of this journal, are somewhat out of touch with happenings in the industry. It is. fairly certain that at least one executive member of a vehicle-manufacturing concern, or of a large operating company, receives a copy, and the suggestion has been made to us that this might be made generally available to the people to whom we refer above. It could be passed around against a list of-names which would be handed in to the management. This appears to us to be a good idea, and well worth trying out. Such lists are, of course, frequently employed in offices, but this would extend their scope.