Physics of the Hen’s Egg

Abstract
This paper is an account of observations made on the composition and behaviour of certain of the membranes in the hen’s egg. The composition is based on the examination of stained sections; the results should, however, give pointers in a purely chemical survey. Needham (1) has reviewed the work—chemical and histological—that has been carried out on the nature of the yolk and shell membranes. The common constituent appears to be keratin, but as he points out, this protein can exist in different forms with somewhat different properties.

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