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238 and unimpaired. The maximum speed of this car was 25 miles an hour; experience is wanting as to what results would follow the use of these tyres on a high-powered vehicle, both as regards wear on the tread and the strength of the attachment.

The Goodyear.—Bolts are also employed, but in a different way, in the Goodyear (fig. 16), a tyre of American origin. They are passed horizontally, to the number of sixteen, through vertical flanges of metal and the intervening wooden felloe. The base of the tyre is thus held by the pressure from the flanges and that of inflation also. Access to the air-chamber is gained by removing the locking nuts and detaching one flange bodily. The cover can then be pulled off its flat bed without any particular difficulty. One of the good points of the Goodyear is that it cannot come off the rim if deflated, nor will it 'creep,' as strands of contracting wires inserted through the base make the circumference constant. To prevent overheating at high speed the fabric has an insertion of asbestos. The Goodyear is very well spoken of by those who have tried it up to now.

The New York.—Another American tyre is the New York (fig. 17). Unlike the foregoing it is of the single tube variety. It is made in light and heavy patterns, the one illustrated being intended for cars weighing over a ton. Owing to the uniform thickness of the walls the tyre can be ridden deflated without material damage. It is fastened to the rim both by vertical and horizontal bolts.