The Making of America, Volume 7

alternating current American idea amount of power apparatus application astronomer automatic boiler British cent century construction cost cotton cylinder dental device direct current discovery dynamo electric current electric lighting electrolytic energy England established Europe experiments fact factory facturing feet graduated hand Hewitt horse horsepower important improvements incandescent inches increase industry institutions interest invention inventors investigations iron labor lamp large number machinery magnet manu manufacture mechanical ment methods mills motors nearly needle Niagara Falls Niagara power Niagara river observatory operation patent Peter Cooper Hewitt pins plant pneumatic power house practical Professor progress railway revolutions per minute scientific sewing machine shaft shoe steam engine steel success telegraph tion to-day transmission turbine United utilized wage earner watch water power water wheels wheel wire wood pulp York