The number of companies that existed to build horse and buggies plummeted at the turn of the 20 th century—from 13,800 in 1890 to only 90 in 1920. A century later, as fate would have it, it’s likely ...

ELECTRIC wiring is not a very suitable subject on which to write a primer. From the wireman's point of view it is a subject to be studied only by practical apprenticeship; from the engineer's it is a ...