Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 21
)oints upon :i sereeii, with the iiid of a lens. Onwatehing the image iov a few minutes, incandescent particleswill be observed traversing tlie length of the arc, sometimes inone direetion and sometimes in the other, the prevailing direc-tion being, however, that of the positive current. This… … IS Fii live carbon becomes concave, while the negative remains pointed,and, as stated above, w^ears away less rapidly. In vacuo thedifference is still more marked. A kind of cone then grows uponthe negative carbon, while a conical cavity is formed in thepositive. Fig. 3 shows a convenient apparatus…
Electrical engineering
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