INDEX 



Urobilin, 376, 387. 417 



tests for, 418 

 Urobilinogen, 417 

 Urocanic acid, 387, 416 

 Urochrome, 376, 387, 4*7. 436, 467 

 Urochromogen, 430, 467 



reaction (Weisz) for tuberculosis, 468 

 Uroerythrin, 376, 387, 416, 436 

 Uroferric acid, 386, 409, 469 

 Uroleucic acid, 386 

 Urorosein, 430, 467 



reaction, 467 



tests for, 467 



Valine, 64, 66, 68, 77 



Van Slyke's apparatus for alkali reserve, 312 



for amino nitrogen, 87 

 Van Slyke's method for determination of total 



amino-acid nitrogen in urine, 526 

 . in protein hydrolysis^ 87 

 acetone bodies in urine, j 5 2^ 



Van Slyke and Cullen's method for urea in blood, 

 286 



for carbon dioxide capacity 



of plasma, 311 

 for urea in urine, 514 

 Van Slyke and Palmer method for organic acids 



in urine, 500 



Van Slyke, Stillman, and Cullen, plasma bicar- 

 bonate titration, 318 

 Vegetable amylase, 4, 1 1 

 lipase, 5, 13 

 protease, 13 

 sucrase, 198, 202 



Vegetable globulins, 93, 95, 107, 108 

 Vegetable gums, 20 

 V ith lactometer.determination of specific gravity 



of milk by, 341 

 Viscosity test, 58 

 Vitamine, 329, 336, 580 

 Vitamine, influence of deficiency of, 580 



influence of deficiency of fat-soluble A, 585 

 water-soluble B, 582 



C, 585 



\ itellin, 94, 95 



Volatile fatty acids, 215, 218, 387, 415 

 Volhard-Arnold method for determination, of 



chlorides, 572 

 Volhard-Harvey method for determination of 



chlorides, 573 

 Volume of the urine, 376 



Water at meals, influence of. 137. 188, 420, 607 



softened, 56 

 Water test meal, 164 

 Water, influence of on metabolism, 607 

 Water deficiency, influence of, 597 

 Water-soluble "B," influence of on growth, 581 



occurrence of, 581 

 Water-soluble "C," influence of, 581 



occurrence of, 581 

 Wax myrtle, 184 



Waxy casts in urinary sediments, 482, 487 

 Weinland, formation of fat from protein, 182 

 Weisz's urochromogen reaction for tuberculosis, 



467 

 Welker's modified method for purine bases. 



535 



Welker and Marsh method for deproteinizi ij? 



milk, 347 

 Welker and Tracy method for deprotcinizir g 



urine, 506 



Weyl's test for creatinine, 402 

 Wheeler- Johnson reaction for uracil and cytosin<% 



132 

 White fibrous connective tissue, 349 



experiments on, 350 



Whitehorn method for chlorides in blood, 285 

 White rats, experiments on, 580 

 Wiechowski-Handovsky method for dett - ' 



nation of allantoin in urine, 535 

 Wilkinson and Peters' test, 338 

 Wirsing's test for urobilin, 418 

 Witchs' milk, 335 



Wohlgemuths' method for quantitative deter- 

 mination of amylolytic aqtivity, 1^5 

 Author's modification of, 242 

 Wolter's method for determination of iron in 



urine, 577 



Xanthine, 125, 126, 131, 358, 362, 364, 368, 4:9 



bases (see Purine Bases, pr "". 364, 419) 



crystalline form of 3^2 



formula for, 126, 364 



in urinary sediments, 475, 481 



isolation of, from meat extract, 368 



silver nitrate, 369 



crystalline form of, 369 

 test, 368 



tests for, 131 



Weidel's reaction for, 131 

 Xanthophylls, 337 

 Xanthoproteic reaction ,98 

 Xanthinoxidase, 5 

 d-xyloketose, 458 

 Xylose, 20, 37, 458 



orcinol reaction on, 37 



phenylhydrazine reaction on, 37 



Tollens' reaction on, 37 



Yeast, eneymes of, 2 



fermentation by, 29, 30 

 growth-promoting .substance in, 581 

 influence on growth 581 

 nucleoprotein of. 127 



preparation of, 127 5& 

 tests on, 128 

 nucleic acid of, 124, 129 

 formula for, 124 

 preparation of, 129 

 tests on, 129 



water-soluble vitamine in, 581 

 Yellow elastic connective tissue, 351 

 composition of 352 

 experiments on ,352 



Youngburg's modification of Van vyke and 

 Cullen's method for urea in urine, 516 



Zein, 66, 68, 93, 95, no 



decomposition of, 66, 68 

 Zeller's test for melanin, 466 

 Zikel pektoscope, 382 

 Zymase, classification of, 4 



preparation of, 2 

 Zymo-exciter, 7 

 Zymogen, 6, 189 



