Seventy-five tons of a 35,000-ton battleship consist of rubber, which, according to the Illinois Automobile Club, is enough to produce 10,341 automobile tires. Other reasons for the restrictions placed on rubber’s nonmilitary use are apparent from the following: A 75-mm. gun carriage requires 1753 pounds and a scout car 339 pounds of rubber; there are 33 to 96 pounds of rubber in an airplane tire, and up to 33 pounds in an inner tube; while 29 pounds of rubber go into each pneumatic raft of the type carried in airplanes.