Studies in microcataphoresis - I—Technique

Abstract

Apparatus and technique are described by means of which accurate measurements for the determination of cataphoretic velocity can be made. The importance of an efficient fine adjustment of the microscope is emphasised. The true velocity may be detd. directly in the "stationary layer" of fluid in the cataphoretic cell. For correlation of results obtained in cells of different dimensions, Komagata''s modification of Smoluchowski''s equation for the velocity of particles in this layer is confirmed. A consideration of previous results justifies the use of the Smoluchowski rather than the Debye and Huckel equation for absolute magnitude of charge on the particle.