Working in RBI's 31,000-sq-ft shop, fabricators applied more than 14,000 sq ft of the ToughGard liner to the ductwork. According to Charlie Kyger, general manager of RBI's sheet metal shop, 10 to 15 ...

A MECHANICAL calculating machine for solving simultaneous linear equations up to ten in number under construction at the Massachusetts Institute of Technology by Drs. V. Bush and J. B. Wilbur was ...