Date of Award


Degree Type


Degree Name

Master of Science in Zoology



First Advisor

John Barlow


In an investigation of the effect of pressure on the developing chick embryo, all environmental factors excepting varying degrees of compression were kept constant.

Eggs were sealed in a compression chamber fitted with a thermometer for temperature control.

A lethal pressure was determined somewhat above sixty pounds. Pressures near this point caused gross malformations including an anamniotic condition.

The general effect of pressure is acceleration of structure formation along with diminution of body size.



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