400 



INDEX 



231; acclimatization, 152; reaction 

 of negative specimens, 154; dis- 

 tribution of sensitive tissue in, 

 156; reaction to electric current 

 compared with reaction to light, 

 158; 258; 265; effect of different 

 wave-lengths on reactions of, 310; 

 reactions in spectrum, 333-335; 



361, 363; 367; 370. 

 Hydroides dianthus, orientation in 

 light from two sources, 87; reac- 

 tions to shadows and acclimatiza- 

 tion, 247, 249; 250; 263; 280; 285; 

 variation and modification in reac- 

 tionsof, 292-295,368; 298;366;373. 



Impatiens, 286. 



Inachus, 355. 



Indian corn. See Zea 7nays. 



Infra-red, effect of : on seedlings, 31 4- 



319, on bacteria, 325, on Daphnia, 



343; cause of invisibihty, 362; 368. 

 Infusoria; 36. 

 Insects, 42, 343. 

 Intensity-difference, 3, 4; effect of, 



on movement of organisms, 15. 



See Light. 



Jassa, 279. 



Jellyfishes. See Sarsia, Gonionemus 

 and BougainvUlea. 



Jennings, 17; work compared with 

 that of predecessors, 44; method 

 of aggregation of lower organisms, 

 45, 46; motor reaction, motor 

 reflex, av'oiding reaction defined, 

 45; theory of orientation (trial and 

 error), 46-49; external stimulus 

 not necessary for activity in or- 

 ganisms, 47; direct orientation, 

 48; analysis of behavior, 49, 50, 

 372-375; on regulation in be- 

 havior, 50, 368, 372; 51; 53; defi- 

 nition of tropism, 56; 57; 58; 



stimulation of Amoeba, 75 ; move- 

 ment of Amoeba, 80; 82; orienta- 

 tion in Euglena, 83, 84; 89; 91; 99; 

 104; 112; orientation of Stentor, 

 113; 114; reactions in Chlamydo- 

 monas, 132; orientation in Hydra, 

 156; 202; 203; orientation in 

 Asterias, 211; ''trial and error" 

 defined, 215; 231; theory of orien- 

 tation compared with that of 

 Engelmann, 240, 323, 324; reac- 

 tions of Aiptasia, 252; 262; 287; 

 293; 297; 328; 369. 



Johnston, 11. 



Joubert, 248. 



Keeble and Gamble, 354. 



Kinnaman, 360. 



Kneip, function of epidermal cells in 

 orientation of leaves, 72. 



Knight, effect of gravitation on 

 curvature of roots, 11, 12; 13. 



Krabbe, 71. 



Kraus, reactions of fungi in spec- 

 trum, 317, 319. 



Labidocera, 227; 266; reversal in 

 reactions, 274, 284, 300. 



Lacrymaria olar, 51. 



Langley, 305. 



Lapidium, 265, 288, 313. 



Larvae, Limulus, 87; Musca, 87; 

 Arenicola, 87; lobster, 226; adap- 

 tation, 237; aggregation of, 242; 

 mosquito, 247;Palaemonetes, 264; 

 Polygordius, 266. 



Leaves, orientation of, 71-73. 



Leeches, 346. Sec CJepsine. 



Leeuwenhoek, 136. 



Leptoplana tremellaris, orientation, 

 in light from two sources, 87; 207; 

 orientation of, 207; 271. 



Liebig, 9. 



Life, primitive ideas of, 5, 51. 



