With the tractor in the lead . . . Swing along to the engine’s roar, See how Fast-Hitch lets you do more… Hitch that blister, disk and plow Right from the seat, you all know how. Outside Chicago last ...

A physicist with an M.A. from Harvard University. JOHN H. TROLLis a consultant for companies that manufacture electronic computers and has worked for many years on thinking machines of various kinds.