INDEX 



625 



Hydrochloric acid test for formaldehyde (Leach), 



323 



acid-zinc chloride solubility test, 49 

 Hydrogen ion concentration and titratable 



acidity, 155, 479-480 

 mode of expressing, 152 

 of blood, determination of, 288 

 of urine, determination of, 480 

 as influenced by diet, 580 

 by acids, 582, 583 

 by alkali, 582, 583 

 comparison of, with titratable 



acidity, 155, 158 



determination of, by means of 

 indicators, 158, 480 



of McClendon's electrode, 



149 

 Hydrogen peroxide in urine, 369, 411 



detection of, in milk, 324 

 Hydrogenated fat, 177 

 Hydrogenation, definition of, 177 

 Hydrolysis of cellulose, 48, 49 

 cerebrin, 357 

 dextrin, 47, 48 

 glycogen, 349 

 inulin, 46 

 proteins, 64 

 starch, 43, 45 

 sucrose, 41, 42 

 0-Hydroxybutyric acid, 270, 271, 284, 295, 412, 



440, S4i 

 Black's method for determination of, 



S4i 



Black's reaction for, 441 

 formula for, 440 

 in blood, 270, 284, 295 

 origin of, 441 



polariscopic examination for, 442 

 quantitative determination of, in blood, 



284, 295 



in urine, 539, 541 

 Shaffer and Marriott's method for 



determination of, 539 

 Hyperacidity, 140, 164 



curve, 164 



Hypercholesterolemia, 247, 270, 271 

 Hyperglycemia, 270, 566 



produced by carbohydrate ingestion, 566 

 Hypoacidity, 140 

 Hypobromite methods for determination of urea 



in urine, 496 



Hypobromite solution, preparation of, 60 1 

 Hypochlorite-orcinol reaction for glycerol, 183 

 Hypoxanthine, 127, 341, 346, 350, 370, 401 

 chloride, crystalline form of, 136 

 formula for, 127, 346 

 oxidase, 127 



Hypoxanthine silver nitrate, crystalline form of, 

 351 



Ichthulin, 94 

 Ignotine, 341, 346 



formula for, 346 

 Imide bonds, 70 

 Iminazolethylamine, 214 

 Iminazolpropionic acid, 214 

 Indican, 212, 386, 542 



formula for, 212, 387 

 40 



Indican, Jaffe's test for, 387 



Jolles' reaction for, 388 



Obermayer's test for, 388 



origin of, 212, 386 



Indicator method for determination of hydrogen 

 ion concentration, 158, 480 



solutions, preparation of, 158 



use of, 158 

 Indicators, experiments on, 152 



table of, 153, 158 



tabulation of results of tests on, 154 



use of, 152 



in gastric analysis, 152 

 Indigo-blue, 213, 388 



formula for, 213, 388 

 Indigo in urinary sediments, 458, 464 

 Indolacetic acid, 214, 452 

 Indole, 212, 218, 223, 237 



formula for, 212 



origin of, 212 



in feces, quantitative determination of, by 

 Bergeim's method, 242 



test for, 218, 237 



/3-Indole-oc-amino-propionic acid, 68, 77 

 Indolpropionic acid, 214 

 Indoxyl, 212 



formula for, 212, 388 



origin of, 212 



potassium sulphate (see Indican, p. 212, 



387, 542 

 Indoxyl-sulphuric acid, 212, 369, 385 



formula for, 212, 386 



Influence of purine-free and high purine diets, 571 

 Infraproteins (see Metaproteins, 94, 115, 116) 

 Inorganic elements in feces, absorption of, 591 



physiological constituents of urine, 370, 402 

 Inosinic acid, 341, 346 



formula for, 346 

 Inositol, 19, 412, 450 



formula for, 450 



in urine, 412, 450 

 Intestinal digestion, 195 



juice, 195 



enzymes of, 195, 196, 198-201 



preparation of, 199-201 

 Inulase, 4, 46 

 Inulin, 20, 46 



action of amylolytic enzymes on, 46 



Fehling's test on, 46 ' 



hydrolysis of, 46 



iodine test on, 46 



reducing power of, 46 



solubility of, 46 



sources of, 46 

 Inversion, 41, 43 



Invertasa (see Sucrase, 4, 41, 195, 199) 

 Invertases, experiments on, 199 

 Invertin (see Sucrase, 4, 41, 195, 199) 

 Inverting enzymes, 3 

 Invert sugar, 41 

 Iodide of dextrin, 45 



of starch, 47 

 Iodine absorption test, 183 



test for starch and dextrin, 45, 46, 47, 49, 

 Si, 56 



for urobilin, 400 



Iodine-sulphuric acid test for cholesterol, .210, 357 

 lodine-zinc-chloride reaction, 49 



