INDEX. 



331 



19 ; on stomata, 110; on circu- 

 lating protoplasm, 20 



Elfviug, on behaviour of grass- 

 haulms on the klinostat, 192 ; 

 on diageotropic runners, 193 ; 

 on etiolin, 54 ; on injection of 

 vessels with cocoa-butter, 92 ; 

 nutritive solution for fungi, 68 n. ; 

 on Phycomyces curving towards 

 iron, 212 ; on heliotropism over- 

 coming geotropism, 182 



Elodea, assimilation of sugar by, 

 32 ; circulating protoplasm in, 

 16 ; used in assimilation ex- 

 periments, 24, 32 ; for Engel- 

 mann's blood-method, 40 ; evo- 

 lution of gas by, 35 ; in experi- 

 ments on metabolism, 313 



Emulsion, filtering of thi'ough 

 wood, 91 



Engelmann, on blood-method of 

 demonstrating oxygen, 39 ; on 

 imbibition affected by heat, 115 

 n. ; on bacterial method, 48 



Enteromorpha, iodine test with, 22 



Enzymes, see Ferments 



Eosiu, rapid absorption of under 

 negative pressure, 87; used to 

 show transpiration current in 

 incised branches, 95 



Epicotyls, nutation of, affected by 

 light, 198 



Epilobium, for water-culture, 61 



Epinasty, 198 



Epinasty and geotropism, 198 



Eranthis hiemalis, stomata, 107 



Errera, on curvature of Phycomyces 

 towards iron, 213 n. ; on heat 

 produced during respiration, 

 12 n.; on injection of vessels, 

 92 n. 



Esters, occurring in extracts, 242. 

 See also Oils 



Ether, effect of, on chlorophyll 

 solution, 50 ; use of, in extrac- 

 tion, 242, 271; use of, in pre- 

 cipitation, 284 



Etiolated plants, form of, 56 



Etiolin, change of tint produced 

 by light in, 54 



Eudiometer, Timiriazeflf's, 9, 45 



Evaporation, 246; under reduced 

 pressure, 247; compared with 

 transpiration, 97 



Extracts, of plant tissues, 242 ; 

 necessary for study of metabo- 

 lism, 238; preparation of, 242, 

 244; filtration of, 245; con- 

 centration of, under reduced 

 pressure, 246; changes occur- 

 ring in, on keeping, 247 



Fagus sylvatica, shade leaves of, 57 



Fats, see Oils 



Fehling's solution, 267, 282, 285, 

 287 



Fermentation, methods of estimat- 

 ing sugars based on, 280 



Ferments unorganised, 303 ; ex- 

 traction of, 304 ; detection of, 

 in extracts, 304; comparing 

 activity of, 304, 307 ; filtration 

 of extracts containing, 304, 308 ; 

 experiments on, 305, 308, 309, 

 311, 320 



Ficus elastica for transpiration 

 experiments, 102 



Filter-plate, use of, 245 



Filtration, 245 ; use of asbestos 

 for, 245; through wood, 91 



Flaccidity, recovery from, under 

 mercury pressure, 90 



Florideffi, colouring matter of, 53 



Flowers, opening and closing with 

 changes in temperature and illu- 

 mination, 219-221 



Formaldehyde, assimilation of, 34 



Frank, on diaheliotropism, 184 n. ; 

 on buds of Taxus and Abies, 

 197 n. ; on decapitation of roots, 

 173 ; on horizontal branches, 

 196 ; on torsion of internodes, 

 196 



Fresenius, Qualitative and Quanti- 

 tative Analysis, 239 



Fritillaria, tensions of tissues in, 

 134 ; pollen of for chemotaxis, 

 218 



Frost, injection of leaves by, 108 ; 

 drooping of leaves during, 178; 

 producing curvature in branches, 

 180 



