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.

    19/26 (page 17)
    degree. The albumen has also acquired a very firm con- sistence, especially when coagulated by heat. The liquor amnii has become more fluid, and the modified albumen, for- merly mentioned, has very much diminished in quantity, or disappeared.* The yelk, which at the end of the first week seemed to have increased in bulk and fluidity, has now ap- parently acquired its original size and consistence. The fol- lowing are the results of the analyses of the constituent prin- ciples of the above two eggs. No. 1. Sulphuric Acid. Phospho- ric Acid. Chlorine. Potash, Soda, and Carb. of Ditto. Lime, Mag- nesia, and Carb. of Ditto. Grains. Grains. Grains. Grains. Grains. Unchanged albumen. .07 .22 .09 •73 .IO Liq. amnii, membranes, &c. .06 .21 •71 .96 .08 Animal - .0 6 .23 .09 .46 .27 Yelk •30 3-34 .id .68 •49 4.00 1.05 2.83 1.14 No. 2. Unchanged albumen. .11 •19 .23 •97 .OQ Liq. amnii, membranes, &c. .03 .20 .70 1.07 .08 Animal - .06 24 .07 •44 .28 Yelk .20 3-30 .10 .42 .70 .40 3-93 1.10 2.90 1.15 • About this time Harvey, and other observers, have noticed the appearance of a curdy or coagulated substance in the oesophagus, crop, stomach, and intestines of the animal. Is this a portion of the modified albumen above mentioned ? D