A text-book on chemistryFor the use of schools and colleges . ammonia. Composition of Urine. Urea Uric Acid Lactic Acid and Extractive Mucus Salts (mostly phosphates and sulphates) Where does pus form? What is bile? Give its is the object of saliva? What is tartar? What is the func-tion of gastric juice ? Give the composition of urine. 494 SPECIFIC GRAVITY OF URINE. The constitution of the urine changes in disease. InDiabetes it contains grape sugar, as may be shown byadding to a small quantity of it, in a test-tube, a dropo
A text-book on chemistryFor the use of schools and colleges . ammonia. Composition of Urine. Urea Uric Acid Lactic Acid and Extractive Mucus Salts (mostly phosphates and sulphates) Where does pus form? What is bile? Give its is the object of saliva? What is tartar? What is the func-tion of gastric juice ? Give the composition of urine. 494 SPECIFIC GRAVITY OF URINE. The constitution of the urine changes in disease. InDiabetes it contains grape sugar, as may be shown byadding to a small quantity of it, in a test-tube, a dropor two of a solution of sulphate of copper, and its ownbulk of solution of caustic potassa. A blue liquid re-sults, which, on being heated, deposits a green precipi-tate, turning red on prolonging the heating, because ofthe formation of suboxide of copper. Diabetic urinemay even be fermented with yeast, carbonic acid andalcohol being produced. The specific gravity of diabetic urine is high, as maybe ascertained by the aid of a urinometer, Fig. 309. Fig, This consists of a glass bulb, prolonged above and be-low into a tube. The lower tube carries a smaller bulb,partly filled with mercury, which is intended to act asballast. The upper tube contains a scale divided from1000 to 1060, the latter figure being nearest the bulbthat is lowest. On putting such an instrument intodistilled water, it should float, as at B, so that the levelof the liquid is exactly at 1000. If this is not the case,it indicates that the instrument-maker has put too muchor too little quicksilver, as the case may be, in the low- How does it change in diabetes ?urine ? Describe the urinometer. What are the tests for diabetic CALCULI.—BONE.—NERVOUS MATTER. 495 er bulb. On immersing it in a liquid of high specificgravity, it floats, as at C; while in diabetic urine theliquid stands at some intermediate point, as seen at A. Albumen is found in urine in Brights disease, andmay be detected by heating. A whit
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