Channing, William F.(William Francis),1820-1901 · Boston : Thomas Hall · leaf 288
Pig. 60. … Fig. 61. mounted plate machines for the production of statical or fac-tional electricity from a plate 16 by 24 inches in diameter.The base is of mahogany, supporting fonr glass pillars, 32 halls catalogue mounted with brass bases and caps; the axle of the platerevolves in brass balls on the top of…
Electrotherapy · Medicine, Physical · Electricity
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