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Show : AUTOMOBILE TI ISLIKHHE BODY! Lessons of Health Science Are Valuable to Owners Own-ers of Cars. Thai to ere is a cioe analogy )c;w ecn an automobile tire and iho human body is t lie statement of one of the leehniea.' experts on the staff oi ;he United States Tire company, says Local Manager NY. ft-T.icobo.d, ft-T.icobo.d, State si roe t and Kxi'hunge -pia-i-e. Tee carcass of a lire may be compared io the bones, tlie tread and side v.alls to t'.ic skin, whi'.e inflation pressure is to a ti:-e what food Is to the body. YV :c:i vou ciit yourself you arc careful to wash "out the injury and to protect it from infection until It hea.s. A fu: in a tire should be jus: as carefully loolie i :''tcr. becaj.se ncglec: will be followed by feet ion" in the form of sand blisters, '.eading to separation and finally ':death" i.i the form o: a blowout. Breaks in the carcass of a lire require ihe same atteiition a a broken bone. T'ne breaks must be repaired and "splints." in ; ac form of a sectional vulcanized inset, applied in order to reinforce Die broken ?art. If you did not continually furnisn your bodv with food to replace that usej up bv ihe digestive processes you would soon die. A lire requires a certain in nation na-tion pressure to enable it to carry its load. "T.Mcestion," in the form of a leaky alve, diffusion throuph the inner tube, etc., filowly uses up tiiis pressure, and if it is not continually replaced the tire soon breaks along the flexing lines and "dies" through a blowout. The carcass of a tire should be as thin and flexible as it can be made and still have the necessary strength. The ideal carcass would be as thin as a soap bubble bub-ble and as strong as steel. A carcass must be made o: cotton fabric, and as strong cotton and as few Dlles (should be used as is consistent witn ihe requisite strenmh of the tire as a whole. This is becau.se the flexing of a lire on the road causes internal friction and the generation of heat. The more plies of fabric used, the greater is this heat, and the faster is the consequent deterioration de-terioration of the rubber in the carcass. Tire Lfc is. therefore, determined by the proper balance between carcass tniek-ness tniek-ness and strength. United P-latts tires arc built as ihin as they can be made without with-out endangering their strength and load-carrying load-carrying capacity. |