INDEX 



Abderhalden, 107 



Ability and age, 246 



Acanthias, 181 



Addison (foot-note), 2 



Adults, stability of, 244 



Age. See Old age. 

 and ability, 246 

 cause of old, 134 

 cellular changes of, 38 

 four laws of, stated, 250 



Age-reckoner, 271 



Allen, B. M., 180 



Altmann, 235 



Amblystomum, 164 



Americans, size, 247 



Amitosis (foot-note), 221 



Amoeba, 152 



Animals, old age of, 30 

 size of, 65 



Annelids, regeneration in, 212 



Ascidians, 2 1 1 



Atrophy with age, 22, 23 



Autolysis, 73 



B 



Baby, psychology of, 236 



Bache fund, grant from, 92 



Balfour, F. M. (foot-note), 77 



Bees, 31 



Bienstock (foot-note), 27 



Biophors, 236 



Bizzozero (foot-note), 192 



Blood corpuscles, 76, 139 



destruction of, 36 



shape, 76 



Blood-vessels, degeneration of, 

 Bombici, 178 

 Bone, 6 1 



and nerves, 32 



in old age, n 



So 



Bouchard, 117 

 Bowditch, H. P., 90 

 Boys, table of growth of, in 

 Brain in old age, 17, 33 



of bees, 31 



Budding in annelids, 212 

 Butler, W. F. (foot-note), 2 



Calkins, G. N., 230, 262 

 Cameron, W. (foot-note), 113 

 Carp, longevity of, 264 

 Cartilage, 60 



ossification of (foot-note), 81 

 Cells, adult, 49 



complete differentiation of, 

 219 



cy "le of, 229 



death of, 80, 83 



defined, 39 



degeneration of, 67 



division of, 42 



embryonic, 47, 48, 135 



four kinds of, 218 



highly differentiated, 219 



illustrated, 132 



multiplication, 44, 134 



number differentiated, 196 



old, 161 



partial differentiation of, 219 



size, 135, 151 



undifferentiated, 135, 152 



young, importance of, 213 



young types, 218 

 Cerebellum, 52, 186 

 Chevreul, portrait of, 6 

 Chick embryos, growth of, 118 

 Chickens, growth of, 101 



growth tables, 256 

 Child at birth, photograph, 7 

 Chromatine, defined, 41 



275 



