Edisons electric light The art of Invention
Edisons electric light The art of Invention
... calculated the power of the instrument and of the lights, the probable loss of power in transmission, the amount of coal the instrument would save in a day, a week, a month, a year, and the result of ... the passage of an electrical current through them, a great number of pieces of such metals forming part of an electric circuit and distributed at vari...
Ngày tải lên: 27/08/2014, 22:01
246
287
0
