. Chemistry: general, medical, and pharmaceutical, including the chemistry of the U. S. Pharmacopia. A manual on the general principles of the science, and their applications in medicine and pharmacy. a sufficient quantity of oxygen to give it the property ofturning green when placed in contact with potassium iodide. Daystest for mucus consists in the application, first, of oxidized tinctureof guaiacum, which by itself undergoes no change in the presenceof mucus, and then in the addition of carbolic acid or creasote,which quickly changes the color of the guaiacum to a bright carbo
. Chemistry: general, medical, and pharmaceutical, including the chemistry of the U. S. Pharmacopia. A manual on the general principles of the science, and their applications in medicine and pharmacy. a sufficient quantity of oxygen to give it the property ofturning green when placed in contact with potassium iodide. Daystest for mucus consists in the application, first, of oxidized tinctureof guaiacum, which by itself undergoes no change in the presenceof mucus, and then in the addition of carbolic acid or creasote,which quickly changes the color of the guaiacum to a bright carbolic acid nor creasote alone will render guaiacum testing for mucus on cloths or when it is mixed with blood, it isnecessary to use the carbolic acid pure 5 but when the mucus is ina liquid state, it is better to use carbolic acid diluted with alcohol. Saliva.—This secretion is an aqueous fluid containing less than1 per cent, of solid matter, of which one-third is an albumenoidsubstance termed ptyalin (from nrvalov, spittle), a ferment that hasthe power of converting starch into dextrin and grape-sugar:alkaline salts, including a trace of potassium sulphocyanate, and Fig. 61. Fig. Spermatozoa. Sarcina ventriculi. calcium compounds, are also present. Days test for saliva in urine,etc. is similar to that for mucus, with the exception that the bluereaction produced by the oxidized tincture of guaiacum and alcoholicsolution of carbolic acid is highly intensified by the addition ofa little ethereal or aqueous solution of hydrogen peroxide. Fatty matter| occurs either as minute globules partially diffusedthrough the urine (as shown at a) or in more intimate emulsion (asat b in Fig. 60). When present in larger quantity it collects asa sort of skim on the surface after standing. _ Spermatozoa are liable to escape notice on account of their smallsize and extreme transparency. Suspected urine should be allowedto settle some hours in a conical test-glass, and the drop at the
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