INDEX 277 



Tables — Continued 



72. Weight of the thymus on age in days 139-141 



73. Increase in the weight of all the viscera — including the thymus — which is entered 



separately — on body length 142-147 



74. Percentage of water in the brain and in the spinal cord — with increasing age — up to 



365 days 148-157 



75. Percentage of dry substances in the entire body, in the several systems and in some 



organs. Observations at seven ages 177 



76. Giving in terms of the dry substance of the entire body the percentage represented 



by the weights of the dry substance of the skin, ligamentous skeleton, musculature 

 and viscera — seven age groups 179 



77. Chemical composition of the entire rat, Hatai (MS '15) 180 



78. Chemical composition of the entire rat McCollum ('09) 181 



79. The phosphorus compounds of the rat as affected by ovariotomy 181 



80. Chemical composition of the brain at different ages 182 



81. Absolute weights of constituents of one brain at different ages 183 



82. Norway rat Percentages of the entire body weight represented by the weights of 



head, trunk, fore-limbs and hind-limbs 195 



83. Norway rat Percentage of the entire body weight represented by the weights of 



the integument, ligamentous skeleton, musculature and viscera 196 



84. Norway rat Weights of crania in series from London, Paris, Philadelphia and 



Vienna 196 



85. Norway rat Increase in the length of the tail and in the weights of the body, brain 



and spinal cord, on body length 203-208 



86. Norway rat Giving the ratios obtained by dividing the body weight in grams, by 



the body length in millimeters 209-210 



87. Norway rat The percentage of water in the blood 211 



88. Norway rat Percentage of water in the brain and in the spinal cord. Ages known 212 



89. Norway rat Percentage of water in the brain and in the spinal cord of rats of 



increasing body weights. Ages not known 213 



Technic Ovaries, weight, 100. 



Body, length, 87. Testes, weight, 102. 



Body, weight, 88. Thymus, weight, 102. 



Tail, length, 87. Teeth 



Brain, weight, 90. 



Spinal cord, weight, 90. Eruption of, 37. 



Eyeballs, weight, 91. Formula for, 37. 



Heart, weight, 92. Incisors 



Kidneys weight 92. Development — time relations, 37. 



Liver, weight, 94. Growth of, 37-39, 83. 



Spleen, weight, 95. Measurement in skull, 38. 



Lungs, weight, 95. Enamel, 38. 



Blood weight, 96. P^ate of growth before attrition, 38. 



Alimentary tract, weight, 97. Rate of growth after attrition, 38. 



Thyroid, weight, 97. Temperature of Body, 60, 61. 



Hypophysis, weight, 98. 



Suprarenals, weight, 99. Testes, descent of, 27. 



