INDEX. 



Absorption by roots of water and 

 salt in certain proportions, 73 ; 

 of water by dead roots, 78; by 

 transpiring plant, 79 



Acer negundo, oxalate in, 66 ; 

 used in experiments on starch, 

 294 



Acer pseudoplatanus, for water 

 culture, 62 



Acid, effect 011 chlorophyll of, 51 ; 

 malic, effect of, on antherozoids, 

 215 



Acidity, see Acids 



Acids, organic, 205; tests for, 

 296; determination of acidity, 

 297 ; experiments on, 301, 318 



Acton, on assimilation of sugar, 

 32 n. ; on water-culture, 58 n. ; 

 on species suitable for water- 

 culture, 61 



Adoxa, runners of, 194 



^sculus hippocastanum, oxalate 

 in, 66 



After-effect, 171 ; heliotropic, 181 



Agitation, machine for continuous, 

 243 



Air, passage of, under pressure 

 through cell-walls, 88 



Air-pump, suction of, compared 

 with transpiration current, 95; 

 Strasburger's and Janse's tran- 

 spiration experiments with, 96 



Albumoses, see Proteids 



Alcohol obtained from methylated 

 spirit, 324 ; use of, in extrac- 

 tion, 242 ; use of, in precipita- 

 tion, 281, 305 



Alisma, for water-culture, 162 



Alkali, use of, in extraction, 245 



Alkalinity, see Acids 



Amaranthus, anthocyan in, 52 



Amides, qualitative tests for, 252 ; 

 estimation of, 257, 258 ; experi- 

 ments on, 259, 260 



Ammonia, 253, 260, 315 ; estima- 

 tion of, 259 



Analysis, preparatory treatment of 

 material for, 240 



Anisotropism, 121, 122 



Antherozoids attracted by malic 

 acid, 214 



Anthocyan, 52 



Apheliotropism, 182 



Apogeotropism, 164 



Apparatus for culture of plants 

 without C0 2 , 28, 30 ; for record- 

 ing geotropic and sleep move- 

 ments, 172, 223 ; and manipula- 

 tion, books dealing with, 240; 

 Winkler-Hempel, for gas-analy- 

 sis, 7, 



Aquatic plants, see Water plants 



Arc-indicator of Sachs, 152 



Aristolochia, nitrates in, 66 



Arum, stomata of, 107 



Arundo donax, variegated leaves 

 of, tested for starch, 23 



Ash of tissues, processes for obtain- 

 ing, 298 ; constituents of, 299 ; 

 determination of chlorine phos- 

 phoric acid alkalies in, 299- 

 300. See also Salts 



Asparagin, see Amides 



Aspergillus, culture of, 68 



