MYSTERIES OF AN EGG.
EXPLAINED BY A PROFESSOR. “The mystery of how eggs come into being is one of thle most profound, if not the most profound, with which the biologist is concerned,” said' Professor Barcroft, in a lecture at the Royal Institution, reported in the Daily Telegraph. The changes which took place in tlhe iegg apart from the actual development of the chick were, We added, of two kinds: Tko/se which took place whether or no the egg was fertilised., and others incidental to the life of the developing chick. Typical of the former was the loss of weight. Typical of the latter was the degree of respiration of the iegg. Eggs breathed. Like their parents, they took in oxygen and gave out carbonic acid/, but only to a small extent until about the end of the second we>ek. Before hatching the chick acquitted powers which made it immune from disease. If a little piece of cancerous tissue from a mouse were injected into a chick while developing within the shell the cancer would grow in the chick. That was true till about a day before hatching. Then a fragment of cancerous tissue would/not grow in f the tissues of the chick. Even if it were there already it would be killed: ,
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Bibliographic details
Putaruru Press, Volume IV, Issue 130, 29 April 1926, Page 5
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213MYSTERIES OF AN EGG. Putaruru Press, Volume IV, Issue 130, 29 April 1926, Page 5
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