Show seven automobiles r rr in use in O 0 united states of interest to the average car owner Is the total number of motor y driven vehicles in the united states and the comparative number of pas cars and motor trucks wl out of approximately 7 motor r vehicles are used for com V mercial purposes passenger cars outnumbering trucks by more than y ten to one about trucks are equip W ped with pneumatic tires showing gf the tremendous strides made by the pneumatic af in the few years w since its a development that J trucks are running on solid w tires indicates wv sf that this and the 7 cushion type will fw always ay have a chiv certain hiv field where superior 7 ja traction 2 and cushioning powers are not necessary |