INDEX 



Abies, permeability of wood to air, 195, 



196 

 Absorption of coloring matter, 180, 181 



gases, 188-190 



liquids, 183 



mineral salts, 183, 217-219 



organs of, 184, 185 

 Acclimatization to chemical action, 56 



heat, 92, 93 



mechanical shock, 20 

 Acer, yearly rhythm, 297 

 Accommodation, nature of, 17 

 Achyranthes, red color in leaves, 125 

 Aconitum, geotropic alterations in, 87 

 Acorus, 114 



Acton, and Darwin, F. , on thermotrop- 

 ism, 97 



on digestion by Drosera, 271, 272 

 Aerobes, respiration of, 251, 252, 253, 



254 



Agave Americana, freezing of, 96 

 Age, 300, 301 



Ailanthus, propagation by roots, 316 

 Aira, propagation of, 325 

 Albumin, tests for, 164 

 Alcohols, 5 



extraction with, 150 



toxic action of, 50, 51 

 Algae, 64, 89 

 Albugo candicans, 248 

 Alkaloids, toxic action of, 56 

 Alnus, yearly rhythm, 297 

 Altmann, theory of structure of proto- 

 plasm, 219, 220 

 Allium cepa, transmitting fibrillae of, 8 



epinasty and hyponasty in, 305 



Neapolitanum, carpotropic move- 

 ments of, 307 



nuclear division in, 281 



propagation of, 325 

 Amarantus, colored sap of, 126 

 Amaryllis, structure of stomata of, 197, 



198 



Amitotic division of cells, 279, 281, 282 

 Anmba, reactions to shock, II. 

 Ampelopsis, contact reactions of, 27 



formation of adhesive tissues of, 27 



spectrum of autumnal colors of, 123 



structure of tendrils of, 29 



Amyloses, properties of, 149, 150 

 Anaerobes, 40, 251, 252, 255, 256, 257 

 Anaesthetics, nature of action of, 51, 52 

 influence on respiration, 252 



on resting periods, 298 

 Anderson, automatic balance, 206 



on measurement of growth by weight, 



293, 294 

 Antherozoids of ferns, chemotaxis of, 59, 



60 



Anthocyan, relation to light and tem- 

 perature, 126 

 Aphototropism, 127, 137 

 Apios, etiolation of, 117 

 propagation of, 324 

 Aplastic substances, 147, 150 

 Apogeotropism, 75 

 Apple, lenticels of, 191 

 Aquilegia, alteration in geotropic proper- 

 ties of, 87 

 Arceuthobium, 249 

 Arcyria, hydrotropism of, 68 



sensitiveness to shock, 10 

 Arisaema, diaphototropism of leaflets, 



138, 139 



effects of pollination in, 303 

 enzymatic glands of, 26, 268 

 etiolation of, 118 



growth in air lacking carbon diox- 

 ide, 229-232 

 of scape of, 285 

 nuclear division in, 281 

 parasite on, 248 

 propagation of, 317 

 resting period of, 298 

 Arthur, on apparatus, 287 



experiment with twining plants, 87 

 on demonstration of hydrotropism of 



roots, 67 



on slide with electric fittings, 104 

 Ascent of sap, 215, 216 

 Ash, 170, 171 

 Aspergillus, 179 

 Aspidium, formation of chlorophyl in 



darkness by, Il8 

 Aspirator, 226 

 Asplenium bulbiferum, bulblets of, 314, 



315 

 Aso, on oxidases, 274 



339 



