Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 546
As com-pared with most otherS3stems it is extremelyshort. The arc in theBrush svstem is nearlyone eighth of an inch. ELECTRIC LIGHTING. 523 The Weston system employs a current of about 18 amperes.The resistance of the lamp is about one and a half ohms.By the use of a heavy current a little larger…
Physics · Lantern projection · Electric apparatus and appliances
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-120-48.webp)
