INDEX 



Ear, advantages of, over 

 the eye, 165-166 



Embryomas, or tumors, 32 



Ehrlich, Prof., side chain 

 theory of immunity, 126, 

 128 



Evolution not the cause of 

 physical life, 197 



Eye: adaptations of, 137; 

 Helmholtz on the, 159- 

 160; unsatisfactory in- 

 strument, 160-164- 



Eyelids, mechanism of, 

 134-136 



Fever a protective reac- 

 tion, 142 



Food question, 49, 118-131 

 Food-stuffs, discriminating 

 selection of, by body 

 cells, 120 



Foraminifera, 81-89 

 Future life, suggestions of, 

 198-201 



Geology records life his- 

 tory of past ages, 3 

 Graves' disease, 145 



Haldane, Prof. J. E.: on 

 the physico-chemical the- 

 ory of life, 131; on 

 adaptation of bodily 

 chemistry, 138 



Hartmann, Prof., on the 

 Darwinian theory, 16 



Helmholtz, on the eye and 

 its defects, 159-160 



Henslow, Prof. G., on 

 natural selection, 17 



Hereditary descent and re- 

 production inseparable 

 from life, 44, 53 



Hertwig, Prof. Oscar H., 

 on natural selection, 15 



Hilgard, Prof., on fer- 

 tilizing bacteria, 76 



Hippocrates on tuberculo- 

 sis, 64 



Hippopotamus a modified 

 pig, 52 



Huxley: on evolution, 189; 

 theory of bathybius, 22 



Hydra fusca, 126-128 



Hygiene, principles of, 106 



Hymenoptera, heredity in, 

 53-56 



Immunity, 50, 125-128; 

 Ehrlich's side chain the- 

 ory of, 126, 128; Metch- 

 nikoff's cell-eating the- 

 ory of, 128 



Incredulity, 180-184; con- 

 trasted with skepticism, 



Interdependence the abso- 

 lute law in the metazoa, 

 97, 114 



Islands of Langerhans, 

 145; diabetes caused by, 

 disease of, 146 



Kala azar, East India 

 disease, 78 



Kellogg, Prof. V. L.: on 

 adaptation, 150; on nat- 

 ural selection, 18 



Korchinsky, H., on nat- 

 ural selection, 17 



Kitasato, Japanese bacteri- 

 ologist, on plague infec- 

 tion, 65 



Lamarckian theory, 26-28 



Leeuwenhoek, Antonius 



von, microscopist, 161 



