272 



INDEX 



Growth Continued 

 Lungs, 95-96. 

 Ovaries, 100-101. 

 Spinal cord, 90-91, N 202. 

 Spleen, 95. 

 Suprarenals, 99-100. 

 Testes, 101-102. 

 Thymus (on age), 102. 

 Thymus (on body weight), 114. 

 Thyroid, 97-98. 

 Viscera combined, 114. 

 Variations in organ weight, 103-104. 



Heredity 



in general, 29. 

 Coat color, 29. 



Independence 



Attainment of, 19. 



Impregnation 

 Time of, 21. 



Length 



of body, 87, N 198. 

 of limb bones, 81-82. 

 of tail, 88-89, N 200. 



Life History, 19, N 189-191. 

 Litter 



Average number in, 26, N 190. 



Second the best, 26. 



Unit for experimental work, 3. 



Litters 



Usual number of, 26, N 190. 



Liver 



Cells and nuclei diameters, 55-56. 



Menopause, 21. 



Metabolism 

 Protein, 58-60. 



Methods 



Statistical, 2. 



for fixation of brain 



Various figuratives, 49-51. 



Formaldehyde, 51-55. 



Migrations, 11-13. 



Mitosis 



in brain, 41, 42. 



in spinal cord, 41-43. 



Modification of Body Growth 



Experimental, 69, 71. 

 Method of measuring, 5. 



Muscles 



Number of fibers and nuclei, 39. 



Myeline Sheath (See Nerves) 

 Nerve Fibers (See Nerves) 



Nerves 



Cerebral 



Number of fibers : 



N. cochlearis, 43. 



N. oculomotorius, 44. 

 Spinal nerves and ganglia: 



Number and size of fibers, 45-47. 



Number of ganglion cells, 43-49. 



Diameter of ganglion cells, 44, 48 

 Peripheral, 48, 49. 



Number of fibers 



N. peronealis, 48. 

 Autonomic 



Fibers less than 4ju, 49. 



Nervous System, 41-49. 

 Fixation methods, 49-55. 

 Physiology of, 61. 



Nitrogen 



Weight of, excreted, 58, 60. 



Norway Rat (See Rat) 



Number 



of mitoses (nervous system), 41, 42. 



of erythrocytes, 40. 



of leucocytes, 40. 



of nerve cells, 41-49. 



of nerve fibers, 41-49. 



of muscle fibers and nuclei, 39. 



Nutrition (See Functions) 



