ELECTROKINETIC STUDIES OF MARINE OVA

Abstract

The method consists in measuring the horizontal displacement from the vertical path of fall of eggs. Charges found are (1) C. tellinoides: Eggs with jelly,[long dash]34.1 millivolts; eggs without jelly,[long dash]28.8 mv. (2) A. forbesii: With jelly,[long dash]19.0 mv.; without jelly,[long dash]19.9 mv.; eggs killed by heat,[long dash]19.0 mv. (3) E. parme: With jelly,[long dash]31.6 mv.; without jelly,[long dash]20.0 mv. (approx.). (4) N. limbata: Unfertilized eggs,[long dash]10.0 mv. (approx.). (5) C. lacteus: Chorions containing eggs move toward the anode. Egg cells move toward the cathode within the chorions. When the charge on these eggs is measured in sea water (corions removed), it is approx. zero.