by John W. Howell and Henry Schroeder

Maqua 1927

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by compte Th. du Moncel and Wm. Henry Preece ; to which is added "The Edison electric light meter," by Francis Jehl, "The economy of the electric light by incandescence," by John W. Howell, and on the "Steadiness of the electric current," by C.W. Siemens

D. Van Nostrand 1882 2nd ed., rev. and enl

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