On one stretch of one and a half miles, the grade averages 1.5 percent about every seventy-five yards.

SIMPLIFIED LESSONS ON PROPER CARE OF AUTOS
(Continued from Sixth Page.)
Outbreaking it, but one hard blow would break it.
Consider the tire for a moment. As the car runs along it is constantly subjected to light blows, but should the wheel hit a large stone while the car is driven at high speed, the tire will be more severe, an extremely severe blow, and often this blow is enough to break or tear the fabric on the inside of the tire, even though the outside will look as perfect. This tear will now be a weak spot which will gradually be one of the weaker, until at last the fabric is not strong enough to hold the tire and the tire blows out.
Where this happens, the driver seldom remembers that he hit a stone, and will invariably claim that the tire was defectives. A large board will break under a heavy blow, so likewise will the strongest fire.

To travel slowly and cautiously over a rough road, especially where large tires are used, the roadbed will not only ruin the tires, but also may be the most effective way to travel.  Cause of a broken spring or broken stone: 1 mile north of the city. The men whose duties it is to adjust the claims of the owners can at a glance tell when a blowout was due to a wakened fabric because of the hitting of a large stone. 