On the proportion of nitrogen contained in alimentary substances taken from both the organic kingdoms as a comparative measure of their nutritive power.

  • Schlossberger, J., Dr.
Date:
[1845]
Catalogue details

Licence: Public Domain Mark

Credit: On the proportion of nitrogen contained in alimentary substances taken from both the organic kingdoms as a comparative measure of their nutritive power. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    connecting link between the two extremities of the nutritive scale of animal aliments we have formed, appears to be the dried extract of meat, which is sold under the name of port- able soup, or bouillon. XV. O'44'l grm. of portable soup, of an excellent quality, gave 0*845 grm. of ammonio-chloride of platinum, equal to 12*16 per cent, of nitrogen. Osmazome is therefore a body rich in nitrogen, probably from containing oxide of proteine, and perhaps also kreatine. We shall give our results on the different kinds of flesh, including that of the fishes also, with which we begin. Common eel, Anguilla vulgaris.—The flesh of this fish is poorer in nitrogen than any of the others which we have exa- mined, in consequence of the large quantity of fat or oil it contains; indeed, during the whole desiccation it was floating in a liquid fat. XVI. 0*345 grm. of raw eel’s flesh gave 0*379 gim. of ammonio-chloride of platinum, equal to 6*91 per cent, of ni- trogen. XVII. 0*306 grm. of boiled eel’s flesh gave 0*329 grm. of ammonio-chloride of platinum, equal to 6*82 per cent, of ni- trogen. XVIII. 0*293 grm. of eel’s flesh, which had been previ- ously washed with distilled water and afterwards boiled in al- cohol as long as any matter separated, yielded 0*667 grm. of ammonio-chloride of platinum, equal to 14*45 per cent, of nitrogen, a quantity as great as that from the higher ani- mals. XIX. 0*274 grm. of the flesh of the salmon, Salmo pario, gave 0*533 grm. of ammonio-chloride of platinum, equal to 12*35 per cent, of nitrogen. XX. 0*286 grm. of boiled salmon gave 0*437 grm. of am- monio-chloride of platinum, equal to 9*70 per cent, of nitro- gen. XXL 0*319 grm. of the purified muscular fibre of the sal- mon gave 0*785 grm. of ammonio-chloride of platinum, equal to 15*62 per cent, of nitrogen. XXII. 0*271 grm. of the raw herring, Clupea Harengus^ gave 0*590 grm. of ammonio-chloride of platinum, equal to 14*48 per cent, of nitrogen. XXIII. 0*314 grm. of boiled herring gave 0*636 grm. of ammonio-chloride of platinum, equal to 12*85 per cent, of ni- trogen. XXIV. 0*350 grrn. of purified muscle of the herring gave 0*802 grm. of ammonio-chloride of platinum, equal to 14*54 per cent, of nitrogen. XXV. 0*4065 grm. of the milt of the herring gave 0 940