600 



INDEX 



DAY-FLIES, life of, 340 

 Death and life, 133 



apparent, 126, 133 



as adaptation, 342 



by over-stimulation, 471 



causes of, 336 



development of, 134, 319, 471 



external causes of, 337 



history of, 134, 319 



internal causes of, 338 



moment of, 134 



natural, 339 



of man, 133 



of cell, 134 



-stiffening, 133, 324, 329 

 Decay, 326 

 Degeneration, hyaline, 336 



waxy, 325 

 Dendrites, 581 

 Depression, 356, 357, 469, 490 



and inhibition, 494 



by chemical stimuli, 371 



by electrical stimuli, 427 



by mechanical stimuli, 388 



by photic stimuli, 403 



by thermal stimuli, 394 

 Descartes, 13 



Descent, theory of, 8, 28, 178, 312 

 Desert-organisms, 279 

 Desmids, movement of, 231 



phototaxis of, 450 

 Desiccation of organisms, 129 

 Development, 178, 204 



as perfecting process, 318 



germinal, 178, 187, 204, 207, 314, 

 575 



mechanics of, 533 



of Amoeba, 204 



of Colpoda, 205 



of the cell, 204, 530 



of the multicellular organism, 206 



of the unicellular organism, 204 



racial, 178, 207, 313, 575 

 Dextrose, 110, 112 

 Diabetes mellituft, 164 

 Dialyzer, 104, 524 

 Diastase, 154 

 Diatoms, locomotion of, 232 



mechanical stimulation of, 389 



photic stimulation of, 402 



phototaxis of, 449 



Didymium, action of oxygen upon, 369 

 Differential theory, Hermann's, 267 

 Differentiation of cells in cell-com- 

 munity, 573 



Difflngia, behaviour of non-nucleated 

 pieces of, 513 



capsule of, 148 



conduction in, 362 



conjugation of, 92, 200 



mechanical stimulation of, 382 



necrobiosis of, 564 



specific gravity of, 98, 229 



Digestion, 150 



Diphtheria, bacilli of, 176 



Direction-corpuscles, 196, 199, 202 



Disaccharids, 112 



Discharge, conception of, 355 



Disintegration, granular, 326 



Dissimilation, 161, 485 



Division of labour, 573 



Dobie's line, 243 



Dobereiner's lamp, 43 



Drosera, changes in nuclei of cells of, 



516 



peptonising ferment of, 171 

 Dualism of body and mind, 7, 14, 16, 



38, 40 

 Dumas, 18 

 Dytiscus, nuclei in eggs of, 514 



Echinodermata, 317 



Ectoderm, 317 



Egg-albumin, 107 



Elastin, 109 



Elaters of spores of horse-tail, 224 



Electric fishes, 268 



organs, 269 

 Electrical induction, 410 



resistance, 407 

 Electricity, animal, 263 



as cause of death, 337 



origin of, 265 



production of, 262 



therapeutic use of, 352 

 Electrodes, non-polari sable, 268, 406, 



455, 



Electromotive force, 407 

 Electrotonus, 414, 421 

 Elements, chemical, 99 



galvanic, 265, 404 



organic, 99 



thermo-electric, 258 

 Empedocles, 8 

 Endoplasm, 235 



Energy, action of stimuli upon trans- 

 formation of, 551 



chemical, 547 



circulation of, 546 



forms of, 209 



introduction of, into organism, 212 



kinetic, 26, 211, 355 



law of conservation of, 26, 210, 211 



mechanics of transformation of, 546 



modifications of, 211 



potential, 26, 211, 355 



theory of specific, 21, 45, 475 



transformation of, in chemical proces- 

 ses, 213 

 Entoderm, 317 

 Enzymes, 109, 151, 156, 171 

 Epigenesis, 17, 535, 538 

 Equilibrium, carbon-, 275 



dynamical, 44, 123 



metabolic, 275, 488 



nitrogen-, 275, 365 



