INDEX 



(309 



KATHODE, 405 



Keratin, 109, 141 



Kidney, excretion by cells of, 166 



Knowledge, astronomical, 33 



conception of, 31, 34 

 Knowledge of nature, du Bois-Rey- 

 mond's definition of, 31 



limits of, 31 

 Kiihne, 23 

 Kymograph, invention of, 23 



Lacrymaria, movement of non-nucle- 

 ated pieces of, 509 

 Lactic acid as excretion, 174 



as product of carbohydrate-decompo- 

 sition, 112,113 



as product of proteid-decomposition, 

 110, 164 



in synthesis of uric acid, 175 

 Lactose, 112 

 Lrevulose, 110, 112 

 Lavoisier, 19 

 Law, biogenetic, 30, 207, 208, 315, 575 



of conservation of energy, 26, 210, 211 



of conservation of matter, 26 



of polar excitation, 414 



Ohm's, 407 

 Lecithins, 109 

 Leeuwenhoek, 15 

 Leucocytes, action of quinine upon, 375 



behaviour of nucleus in narcosis of, 

 521 



chemotaxis of, 430 



degeneration of, 323 



food-ingestion by, 144 



food-selection by, 148 



in necrobiosis, 327 



role of, in histolysis, 322, 432 

 Lieberkithnia, ingestion and digestion of 



food by, 152 

 Liebig, 23 

 Life, actual, 132 



and apparent death, 126 



and death, 133 



as proteid-metabolism, 136, 310 



conception of, 2, 303, 309 



external conditions of, 273, 274 



general and special conditions of, 273 



internal conditions of, 273, 294 



latent, 132 



origin of, 297, 307, 311 



Pfliiger's idea of origin of, 304 



potential, 132 



primitive ideas concerning, 3, 7 



theory of continuity of, 121, 302, 309 

 Light, action of, in plant-cell, 158, 217, 

 547 



introduction of, into organism, 217 



nature of organic, 254 



production of, 253 



Lightning-bug, luminosity of, 254, 255 

 Limn, 92 

 Liquefaction, 325 



Living and lifeless, 4, 118, 481 

 Living substance, chemical properties 

 of, 99 



composition of, 55 



formation of, 483 



galvanic current of, 266 



inorganic constituents of , 114 



optical properties of, 98 



organisation of , 93, 119 



physical properties of, 93 



specific gravity of, 97 

 Ludwig, 23 

 Luminosity of chemical substances, 256 



organic, 253 



MACRON UCLEUS, 92, 201, 343, 517 



Magendie, 25 



Magnetism, animal, 349 



Magospficera as cell-republic, 568 



Malpighi, 15 



Man, fasting of, 276 



development of, 339 

 Marey, 23 

 Mass- effect, 43 

 Matter and mind, 34 

 Matter, law of conservation of, 26 



nature of, 33, 35 

 Maturation of ovum, 199, 202 

 Maximum of excitation, 471 



of stimulus, 350 



of temperature, 288, 291, 396 



of vital conditions, 349 

 Mayow, 15 



Mechanico-dynamical system of Hoff- 

 man, 16 



Mechanical energy, production of, 219 

 Mechanical equivalent, 212 

 Mexembryanthemum, water in, 279 

 Metabolism, 137. 483 



action of heat vipon, 390 



action of stimuli upon, 489 



and oxygen, 366 



as characteristic of living organism, 

 125, 131, 311, 477 



curve of, 177 



in manufacture of sulphuric acid, 1 25 



in tetanus, 388 



of animals, 164, 173 



of plants, 164, 173 



scheme of, in cell, 522 



self -regulation of, 489 



without nucleus, 518 

 Metachronism of ciliary motion, 247, 



570 

 Metamorphosis, 330, 491 



amyloid, 334, 491 



colloid, 336 



fat, 331 



mucous, 332 



Metaphysics and natural science, 39 

 Metaphyta, 316 

 Metazoa, 316 

 Micronucleus, 92, 201, 343, 517 



R R 



