Journal . f again lowered. Should there be a film of water therefore no proof of the presence of sugar in urine,on the mercury in a it must be removed, lcc, urine is —-s- H. New Apparatus for the Determination of Urea. ( Bull. Soc. Chim. [2], 46, 641. The lower end of the burette b is provided with two shortside tubes, a and n .? a stout piece of caoutchouc tubingconnects o with the cylinder a, which is tilled with mer-cury, and ii similarly communicates with the tube latter i- fastened to // by means of brass wire. Thelower end of the burette is furnished with a caoutchoucSt
Journal . f again lowered. Should there be a film of water therefore no proof of the presence of sugar in urine,on the mercury in a it must be removed, lcc, urine is —-s- H. New Apparatus for the Determination of Urea. ( Bull. Soc. Chim. [2], 46, 641. The lower end of the burette b is provided with two shortside tubes, a and n .? a stout piece of caoutchouc tubingconnects o with the cylinder a, which is tilled with mer-cury, and ii similarly communicates with the tube latter i- fastened to // by means of brass wire. Thelower end of the burette is furnished with a caoutchoucStopper, and through it passes the tube k-l, whichreaches to the level of the side tube o, and is closedbelow by a stop-cock m. In order to use the apparatus, water is poured into e,and a portion of it allowed to How into the burette. </is now closed and in opened, so that the water passesout of the burette, care being taken that /. S remains fullof water, and that no air -bubbles can enter. The appa-. 160 Till-: JOURNAL OF Till. SOCIETY OF CHEMICAL INDUSTRY. [Feb. lions. T. Med. \\ iss. 1886, 11 Solutions of peptone, pare egg-albumen, serum-albu-ni-ii. and casein mixed with a Bolution of a naphthol orthymol give on addition of concentrated Bulphuric acidin excess the same reaction, which Molisch has recently- a reaction characteristic of sugar and othercarbohydrates. Possibly the albuminoids are decom-posed by the sulphuric acid with formation of all events, Molischa reaction has lost value, andcertain conclusions drawn from it have therefore becomeuntenable—such, , as the assertion that normalurine unquestionably contains sugar.—A. R. Modifications of KjeldahTs Method of Estimating Nitro-gen. C. Arnold. Arch. d. Pharm. 1886, 792. Tut: author recommends the following alterations :— 1. The llask in which the substance is heated withsulphuric acid is closed by a test-tube, the middle of\\ hich is expanded into a bulb in orde
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
