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, 



92 n. 

 Schimper 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, 51 n. 

 Schwarz on a centrifugal machine, 



170 n. ; on proteids, etc. 249 

 Schwendener and Krabbe on dia- 



heliotropism, 189; on growth 



and plasmolysis, 148 

 Scilla 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 

 Sempervivum used in experiments 



on ash, 302 

 Setaria italica, cotyledon alone 



sensitive to light, 183 

 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 



C02,29 

 Sodium, in culture of Fungi, 70 

 Solutions, standard, required for 



experiments on metabolism, 324 

 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 n. 



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 

 CO^, 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, 

 103 



Stomata, 102 ; affected by salt so- 

 lution, 106 ; in relation to as- 



