Index of Authors vii 
PAGE 
Stiles, Walter. Permeability 
XI. The Determination of the Permeability of Plant Cells 
to Dissolved Substances . . i 
XII. Quantitative Relations in the Penetration of Dissolved 
Substances into Plant Cells . . . 72, 128 
XIII. Reversible and Irreversible Changes in Cell Permeability 204 
XIV. Theories of Cell Permeability (1 Text-fig.) . 217, 239 
XV. Concluding Remarks ..... 245 
Literature cited ..... 247 
Turrill, W. B. Convolvulus nitidus Boiss., from the Balkan 
Peninsula . „ . . . . .95 
Tuttle, Gwynethe M., see Lewis 
