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An electrical oncograph

, : An electrical oncograph. Fiziol Zhur Sssr 40(6): 729-734

The basis of the method is the recording of resistance changes of a solution between the electrodes, which depends on volume changes of the solution. The apparatus converts ohmic resistance fluctuations into voltage fluctuations, amplifies and then records by a magnetoelectric recorder, or by means of an oscillograph and cardiograph, or photographically from the screen of a cathode ray tube. Of the 3 oncograph schemes used, the bridge and differential schemes are described in detail and illustrated. Photographs of electrooncograms of the thoracic organs and a general view of the apparatus are shown. Only relative volume changes are measured by means of the apparatus.


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