Poynting, J. H. (John Henry), 1852-1914, Shakespear, Gilbert Arden, ed, Barlow, Guy, joint ed · Cambridge, University Press · leaf 296
Dr. Lodges Fig. 36. Rows of cells alternately Dr. Lodges Fig. 37. Section of a magneticpositive and negative, geared together, field, perpendicular to the lines of force; and free to turn about fixed axes. alternate cells rotating oppositely. (Another mode of drawing Pig. 36.)
Poynting, J. H. (John Henry), 1852-1914 · Physics
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