Chicago : [Popular Engineering Pub. Co.] · leaf 697
POPULAR ELECTRICITY … Your customers wouldn't hire six men to do the work that two could do with ease. Yet perhaps 828 they continue to use six horse power to drive distant machines by old line-shaft methods, that only require about two horse power, when driven by our adjustable speed motors. Why not go after this…
Electricity
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
