The Problem Of Battery Charging

C E of the many advantages of electric vehicles for local delivery of milk, bread, groceries, etc., is the cheap running cost, which is low even when compared with that of a......

A Work-saving Device With Countless Uses

TAPERED, slotted and hardened, I like a tap, Shakeproof screws cut their own threads and can be driven into metal after merely forming a plain hole. Moreover, when screwed home,......