Non-random Distribution of Bull Spermatozoa in a Drop of Sperm Suspension

Abstract

DR. MAUDE'S interesting suggested interpretation of the non-random distribution of bull spermatozoa in a drop of sperm suspension may be susceptible to experimental verification. As mentioned in my original communication, other interpretations are possible. On the basis of subsequent experiments I am inclined to favour the absence of elastic collisions between spermatozoa and the glass surfaces as the more probable one ; but a combination of the two interpretations is not excluded. The observed distribution may have some bearing on the phenomenon of positive sperm rheotaxis.