New acid in the juice of flesh, not yet studied. Another nitrogenised acid in flesh. Urea not found in flesh. give rise, on incineration of the residue, to so great a mass of cyanide of potassium. When that part of the juice of flesh which is soluble in alcohol and in ether is mixed with sulphuric acid, to separate the alkali, and the filtered liquid is left at rest for some days, there are deposited long transparent colourless needles, which have a strong acid reaction and contain no alkali. I first noticed this substance at the close of this investigation, and obtained too small a quantity to enable me to analyse it. Lastly, if the acid liquid thus obtained be saturated with lime, evaporated to dryness, and the residue washed with alcohol, the addition of ether to the alcohol causes a deposit; and the liquid separated from this contains kreatinine, combined with an organic acid, rich in nitrogen, which I have, in like manner, not yet more minutely examined. I have taken the utmost pains to detect urea or the juice of uric acid in the juice of flesh, and I believe that I should have succeeded in doing so, even had no more than one-millionth part of these substances been present. According to my experiments, therefore, urea is not a constituent of the juice of flesh. In one case only where I had added chloride of barium to the alcoholic solution of the extract of Uric acid supposed to have been found occasion only. in it on one flesh, crystalline flocculi separated after exposure for weeks in the air. These were not dissolved by hot water or in hydrochloric acid, but dissolved in nitric acid, with disengagement of red fumes, exactly like uric acid; and the solution gave with ammonia the same purple colour which uric acid would have given in like circumstances. This substance, however, I have not been able again to procure. ADDENDUM. NOTE BY THE EDITOR. From the mother-liquor which had deposited the kreatine which I prepared and which contained the soluble matter of nearly 7 lbs. of fowl, I obtained, by the process indicated at p. 77, by the author, 4 grammes, or about 61 grains of pure and well-crystallised inosinate of baryta. It is certain that I did not succeed in obtaining the whole of the inosinic acid originally present in the juice; but the above quantity was procured without difficulty; and it would therefore appear that in fowl, at least, the quantity of inosinic acid is not so small or insignificant as the author seems to think. TABLE SHOWING THE PROPORTION BETWEEN THE ENGLISH AND HESSIAN STANDARD OF WEIGHTS AND MEASURES. 1 lb. English is equal to 0.90719 lbs. Hessian. 1 Hessian acre is equal to 26,910 English square feet. 1 English square foot is equal to 1·4864 Hessian square feet. 1 English cubic foot contains 1.81218 of a Hessian cubic foot. |