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The Electrical Conductivity of Fertilized and Unfertilized Eggs.

Published online by Cambridge University Press:  11 May 2009

J. Gray
J. Gray
Affiliation:
King's College, Cambridge.
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Extract

The following is a preliminary account of some experiments carried out this summer at Plymouth. They were undertaken with a view to the investigation of the changes, both physical and chemical, which are induced in the egg by the entrance of a spermatozoon.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 10 , Issue 1 , November 1913 , pp. 50 - 59
Copyright
Copyright © Marine Biological Association of the United Kingdom 1913

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References

* When not actually in use the electrodes were kept immersed in clean sea-water.

† These remarks apply to eggs which gave a resistance of 70 ohms and upwards.

* In the case of Echinus miliaris plutei, which according to Shearer, De Morgan and Fuchs fail to develop their green pigment if unhealthy, my cultures invariably possessed this character and were, inthe opinion of Dr. Shearer, perfectly healthy. (Most of the cultures were discarded as soon as the Echinus rudiment had reached considerable size, but in two cultures which were preserved the larvæunderwent perfectly typical metamorphosis—a little more than a month after fertilization, which is in agreement with the rate of development of the egg under normal conditions.)