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Huston & Nalbandov (1953) and van Tienhoven (1953) were the first to draw attention to the possibility that egg formation in the fowl is influenced by factors arising in the oviduct itself, and although their claim for the existence of a neural link between the oviduct and the anterior pituitary gland has not yet been confirmed (Sykes, 1962), it has been shown that shell formation can be profoundly disturbed by the presence of a foreign body in the uterine region of the oviduct (Sykes, 1953; Lake & Gilbert, 1964).
The gross changes in egg composition which occur after the insertion of a single loop of cotton thread in the uterus of the hen are reported here. The shell (with membranes) and the yolk were weighed, and the albumen content obtained by difference. Shell calcium was determined by oxalate precipitation after wet ashing (King & Wooton, 1956).
In the presence of
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