INDEX 



435 



Tendon, 172 ; sheaths, 180. 



Tension and rate of growth, 374. 



Tension of gases, 246. 



Tension, see surface tension. 



Tetanus, 145. 



Thermal conductivity, table of, 340. 



Thermal efficiency, 33. 



Thermodynamics, laws of, 3, 5. 



Thermometer, Beckmann's, 400 ; clinical, 



337. 



Thermopile, 145, 338. 

 Thigmocytes, 237, 241. 

 Thorium, 123, 124. 

 Threshold values, 163, 193. 

 Thrombin, 235, 236, 237. 

 Thrombokinase, 235. 

 Thromboplastin, 236. 

 Thymus, 238, 373. 

 Thyreoid, 373. 

 Tidal air, 259. 

 Tissue, connective, 168 ; elasticity of, 



169 ; fibrous, 171 ; strength of, 170 ; 



vegetative, 166. 

 Tone of muscle, 142. 

 Tongue, 196, 314, 325. 

 Touch, 193. 



Touch-button mechanisms, 312, 318. 

 Transmission of acquired characters, 361. 

 Trigger action, 183. 

 Trigger energy, 7, 8, 138, 146. 

 Trophic and secretory nerves, 153. 

 Tropisms, 131, 354. 

 Trypsin, 96, 97, 101. 

 Turgor, 364, 399. 

 Tympanic membrane, 201. 

 Tyndall phenomenon, 70, 409. 

 Types of colloids, 69 ; dispersoids, 68 ; 



emulsions, 84. 



Ultra-filtration, 75. 



Ultra-microscope, 74. 



Ultra-violet light, 14, 20, 126 ; action of, 



on organisms, 126, 127, 132. 

 Uranium, 120, 121. 



Urine, formation of, 162 ; work done in 

 formation of, 157. 



Valves of heart, 288 ; veins, 288. 



Vapour pressure, of a liquid, 38 ; and 

 osmotic pressure, 43 ; Barger's de- 

 termination of, 402. 



Variations in growth, factors causing, 

 368. 



Vectors, law of, 376. 



Vegetative tissues, 166. 



Velocity of growth, 368. 



Vibratory energy, receptors for, 192, 

 193, 194, 200, 215. 



Viscosity, measurement of, 409, 422 ; of 

 blood, 242, 243, 422; of emulsoids, 

 389 ; of plasma, 232. 



Visual judgments, 226, 227. 



Vital capacity of lungs, 259. 



Volition, 11. 



Volume of blood, 250. 



Volume of blood corpuscles, 243. 



Waller's characteristic, 184. 



" Waste " heat, 6, 12, 390. 



Water, chemical formula of, 54 ; di- 

 electric constant of, 53 ; dissociation 

 of, 55 ; electric conductivity of, 53, 

 55. 



Water equivalent of calorimetric bomb, 

 25 ; of human body, 341. 



Water, heat conductivity of, 340, 345. 



Weimarn, von, law of, 69. 



Work, done in formation of urine, 15'3; 

 done in secretion, 150, 154 ; of heart, 

 280 ; of lungs, 310 ; of muscle, 136, 

 142 ; of phonation, 359. 



X-rays, 119, 120. 



Young's modulus, 168, 169. 



Zymase, 97. 

 Zymogen, 97. 



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