148 



DIFFUSION AND OSMOTIC PRESSURE 



POTASSIUM NITRATE : absorption of, 120 ; 

 in plasmolysis, 56, 61; in turgor, 83; 

 penetrating power of, 65, 68, 74, 77. 



PRESSURE: exudation, 102; gas, 9; os- 

 motic (see Osmotic pressure). 



PROTOPLASM, 49. 



PROTOPLASMIC MEMBRANES, action of, 80. 



PURIEWITCH, 78. 



QUERCUS, copper in, 69. 



QUINCKE, 82. 



RACIBORSKI, 132, 137, 138. 



REINHARDT, 88. 



REPRODUCTION, in osmotic solutions, 138. 



RICHARDS, 68. 



RICHTER, 139. 



RISE OF WATER, 107. 



ROOT HAIRS, exudation from, 75. 



ROOTS, permeability of, 69. 



ROTHERT, 140. 



SALTS, inorganic, penetrating power of, 

 67, 71. 



SAMBUCUS, permeability of, 76. 



SAP : cell, 52 ; expressed, conductivity of, 

 85. 



SARGENT, 128. 



SCHEFFER, 18. 



SCHNEIDER, 112. 



SCHWENDENER, 76. 



SEEDS, in osmotic solutions, 130, 131. 



SELECTIVE POWER, 118. 



SIPHONED}, bursting of, 54. 



SKERTSCHLEY, 69. 



SLOSSON, 131. 



SODIUM, penetrating power of, 69. 



SODIUM CHLORID : in plasmolysis, 61 ; 

 penetrating power of, 68, 74; in me- 

 dium, 137. 



SODIUM NITRATE: absorption of, 120; 

 penetrating power of, 79. 



SOLIDS, absorption of, 118 ; diffusion of, 

 14. 



SOLANUM, absorption by, 69. 



SOLUTES: absorption of , 115; active, na- 

 ture of, 83; transmission of, 120. 



SOLUTION, Knop's, 132. 



SOLUTIONS: denned, 16; properties of, 

 124 ; molecular, 21 ; normal, 21 ; of gases 

 in liquids, 17; of liquids in liquids, 16; 

 of solids in liquids, 18; terminology 

 for, 20. 



SOLUTION THEORY OF SEMIPERMEABIL- 

 ITY, 80. 



SPERMS, in osmotic solutions, 129, 139. 



SPIROGYRA : cold plasmolysis of, 75, 141 ; 

 permeability of, 62, 65. 68. 



STAHL, 140. 



STANGE, 84, 130. 



STENTOR, cold plasmolysis of, 75, 143. 



STEVENS, 69. 



STICHOCOCCUS, permeability of, 70. 



STIGEOCLONIUM : drying out of, 143; in 

 osmotic solutions, 132, 138; zoospores 

 in solutions, 139. 



STOMATA, 93. 



STRASBURGER, 110. 



STRATIOTES, permeability of, 62. 



STRONGYLOCENTUTUS, eggs of, 129. 



SUCRASE, penetrating power of, 71. 



SUGAR, CANE : in plasmolysis, 61 ; pene- 

 trating power of, 65. 



SUNFLOWER, permeabilty of, 65. 



SUPPORT, mechanical, by turgidity, 87. 



SURROUNDING MEDIUM, influence of, 124. 



SUTHERST, 85. 



TAMMAN, 36. 



TEMPERATURE: influence of, on absorp- 

 tion, 95 ; influence of, on permeabilty, 

 75 ; influence of, on turgor, 77. 



TENSION, diffusion, of solvent, 30. 



THEORIES : of matter, 3 ; of semipermea- 

 bility, 82. 



THUNBERGIA, permeability of, 71. 



THUYA, transpiration of, 111. 



TONIE, 59. 



TONOPLAST, 52, 53, 80, 82. 



TRADESCANTIA, permeability of, 56, 62, 

 76. 



TRANSMISSION: of solutes, 115, 120; of 

 water, 95. 



TRANSPIRATION, 93, 96. 



TRANSPIRATION STREAM, 107. 



TRAUBE, 50. 



TROPISM, reversal of, 139. 



TRUE, 68, 137. 



TURGESCENCE, 52. 



TURGIDITY: nature of, 49, 52, 53; main- 

 tenance of, 86, 121 ; relation of, to activ- 

 ity, 87. 



TURGOR, 52, 55, 74. 



TURNIP, pressure of sap of, 85. 



UREA: in plasmolysis, 62; penetrating 

 power of, 77, 79. 



VACUOLE, 52. 



VANDERVELDE, 131. 



VAN RYSSELBERGHE, 76, 134. 



VAN'T HOFF, 25, 37, 40. 



VEGETABLE MARROW, pressure of sap of, 

 85. 



VESQUE, 95. 



VICIA : nectaries of, 79 ; roots of, 65. 



VIOLET, methyl, penetrating power of, 

 66. 



VOIGTLANDER, 18. 



VON MAYENBURG, 67, 83, 118. 



WALDEN, 36. 



