Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 188
urned to a point. Thecrater formed in the upper carbon acts as a reflectorand it is from this point that the greatest amount oflight, or about 80 per cent of the total light of the arc,is emitted For this reason the positive carbon alwaysoccupies the upper position unless, for special rea-sons, it… … Figure 129 tion of the upper carbon is due to the volatilizationof the carbon at the crater, considerable vapor beingformed at this point which is carried across the arcand condensed on the negative carbon. If, when the arc lamp is burning in its normal con-dition, the carbons are separated, it…
Electrical engineering · Electric testing
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