Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 85
J^ig. 37- CHAP, I.] ELECTRICITY AND MAGNETISM. 67^ excitations and muscular contractions of human beingsalso give rise to feeble discharges of electricity. … Fig. 38. 69. Electricity of Vegetables.—Buff thought hedetected electrification produced by plant life; the rootsand juicy parts being negatively, and the leaves posi-tively, electrified. The subject has, however, been littleinvestigated. 70. Thermo-electricity. — Heat applied at thejunction of two…
Electricity · Magnetism
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