RESEARCHES ON PEPTONES.

다국어 초록 (Multilingual Abstract)

Peptones, the ultimate products of peptic digestion, have hitherto been found difficult to obtain in a state of purity, owing to their tendency to retain mineral salts or bases, and have yielded on incineration from 3 to 7 per cent. of ash. Maly obtained a fibrin-peptone, which yielded only 0.64 per cent. of ash, by separating the mineral substances by diffusion. The author proposed to attain the same end, by starting with albuminoids free from mineral matter, and using subsequently only such reagents as could be completely removed by precipitation. Substituting, therefore, sulphuric for hydrochloric acid, he found the process required two or three times as long for completion, but the acid could then be exactly removed by baryta.