338 



INDEX. 



Salicin, 274; decomposed by sy- 

 naptase, 311 



Saligenol, 311 



Salix, used in experiments on 

 glucosides, 275 



Salts (inorganic), 297; experi- 

 ments on, 302, 313, 318, 319, 

 321 ; see also Ash 



Sambucus nigra, nitrates in leaves 

 of, 67 ; lenticels of, 110 n. 



Saponification of oils and fats, 



262 



Saussure de, see De Saussure 



Scheit, on injection of vessels, 



92n. 

 Schirnper on calcium oxalate, 66; 



his method with chloral hydrate, 



22 ; on nitrates, 66 ; on use of 



polariscope for finding minute 



crystals, 121 ; on water-culture, 



59 n. 



Schulze on Cellulose, 291 

 Schulze's macerating fluid, 116 

 Schunck on action of acid on 



chlorophyll, 5 In. 

 Schwarz on a centrifugal machine, 



170 n. ; on proteids, etc. 249 

 Schwendener and Krabbe on dia- 



heliotropism, 189; on growth 



and plasmolysis, 148 

 S cilia nutans, pollen of, for che- 



motaxis, 216 



Scrophularia for water-culture, 62 

 Seaweeds, pigment of, 53 

 Seeds, dry, withstand heat, 15; 



respiration of, 1; variable rate 



of swelling of, 117 

 Sempervivurn used in experiments 



on ash, 302 

 Setaria, cotyledon alone sensitive 



to light, 183; to gravitation, 170 

 Sicyos, tendrils, 200 

 Sinapis, negative heliotropic roots 



of, 180; -roots, growth of in 



light and darkness, 162 

 Sleep of leaves, 221-223 

 Soda-lime, use of in culture without 



C0 2 , 29 



Sodium, in culture of Fungi, 70 

 Solutions, standard, required for 



experiments on metabolism, 324 

 Sorghum cotyledon sensitive to 



gravitation, 17G 



Soxhlet's apparatus, use of, 242 



Sparganium, used in experiments 

 on metabolism, 313 



Sparmannia, for experiments on 

 root-pressure, 76 ; for translo- 

 cation experiments, 32 ; stomatal 

 transpiration of, 104 



Spectroscope, use of in examination 

 of chlorophyll solution, 52 



Spirogyra, assimilation of formal- 

 dehyde by, 34 ; for Engelmann's 

 blood-method, 39 ; used in experi- 

 ments on metabolism, 312 



Splint-wood, permeability of, 90 



Spores of fungi, germination of, 71 



Spring-balance, used in transpira- 

 tion experiments, 100 



Stahl, on cobalt method for tran- 

 spiration, 104 ; on geotropic 

 growth influenced by light, 194 ; 

 on lenticels, 110 n. ; on move- 

 ments of chloroplasts, 214; on 

 stomata and assimilation, 26; on 

 sun and shade leaves, 57 



Stamens, of Berberis irritable, 209; 

 of Centaurea irritable, 212 



Stange, on effect of salt solutions 

 on growth, 144 u. 



Starch, 290; disappearance of in 

 darkness, 23; estimation of, 

 292 ; experiments on, 293, 307, 

 313, 317, 318, 320-322 ; extrac- 

 tion of, 243, 244, 291; forma- 

 tion of dependent on presence of 

 C0 2 , 28, 29; used to print 

 photographic negatives, 25 ; ma- 

 croscopic test for, 21; products 

 of hydrolysis of, 291, 307; 

 viewed with polariscope, 121 



Starch-formers, 34 



Sterilisation, methods of in culture 

 of fungi, 68 



Stigma, irritable in Mimulus, 211 



Stimulus, transmission of in Mi- 

 mosa, 202 ; in heliotropic curva- 

 ture, 183 ; in Drosera, 209 



Stipa-awn, imbibition affected by 

 temperature, and by salt solu- 

 tion, 115 ; mechanism of twist- 

 ing, 116 ; hygrometer made of, 

 102 



Stomata, 102 ; affected by salt so- 

 lution, 10iJ ; in relation to as- 



