A THEORETICAL CONSIDERATION OF THE ACTION OF X-RAYS ON THE PROTOZOAN COLPIDIUM COLPODA.
1. The theory which Crowther has advanced to account for the variation of the lethal dose of roentgen rays among the individuals of a group of Colpidium colpoda is reviewed. 2. It is shown that the use of his small-body theory to explain the small value of lambda(e) leads to certain further assumptions about the nature of the destructive effect. 3. An alternative hypothesis is discussed.
Clark
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Laboratories of The Rockefeller Institute for Medical Research.