Some experiments on the changes which take place in the fixed principles of the egg during incubation.

  • Prout, William, 1785-1850.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: Some experiments on the changes which take place in the fixed principles of the egg during incubation. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    oil was obtained in a separate state. On cooling, it became nearly solid, and weighed 91 grains. The albuminous prin- ciple above mentioned, weighed 55.3 grains. Hence this yelk consisted of Grains. Water . . 170.2 * Albumen ? . 55.3 Yellow Oil. . 91.0 Si 6-5 But I have reason to believe that the proportions of these ingredients differ a little in different eggs. Experiments on the egg at the end of the first week of incubation, or about the 8th day. At the end of the first week, it has been found, on an ave- rage, that on the supposition that the egg originally weighed 1000 grains, it has now lost about 50 grains, and the weights of the constituent principles of two eggs in their moist state, were as follow: Unchanged albumen Modified albumen Liq. amnii, membranes, blood-vessels, &c Animal ..... Yelk .... Shell and loss .... * This proportion of the albuminous principle does not differ much from that stated to exist in the yelk of the common fowl, by Mr. Hatchett. Philos. Trans, vol. cvi. p, 308. No. 1. No. 2. Grains. Grains. 232.8 247.I 179.8 1 97-o I275.2 22.0 J 301-3 334-5 167.1 153-2 1000.0 1000.0