. Electronic apparatus for biological research . ooooo ooo O CO CM 03 vj vj 00 C>J «— ,— 1 1 Temperature of phototube °C Figure Effective cathode dark current of a multiplier phototube with antimony- caesium photocathode as function of tem- perature. {By courtesy of the Journal of the Optical Society of America^^) 364

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity