Electron Bombardment of Biological Materials. I. An Electron Tube for the Production of Homogeneous Beams of Cathode Rays from One to Fifteen Kilovolts

Abstract
An apparatus for the bombardment of small samples with electrons of 1 to 15 electron kilovolts energy has been developed and used. Special features render it particularly suited to a study of those biological materials which can tolerate high vacuum. The details of the construction and operation of the tube and of auxiliary apparatus are described.

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