Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 51
en filaments, given properheat treatment, become coated with a surface layer of thoriumwhich is very stable unless the temperature is excessive. Thefilament then has the properties of a thorium filament and com- Proc. Am. Pliys. Soc, Washington meeting, April, 1922. 36 K. T. COMPTOX. [J. F. I.… … 1800 2000 2200 2^00 2600Temperature EFFECT OF SPACE CHARGE. Although equation 2 gives the total rate of emission of elec-tricity from a metallic surface, the actual thermionic current isoften less than this because some of the emitted electrons returnto the emitting metal, being forced back by the…
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