ACKNOWLEDGEMENTS 



Grateful acknowledgement is made for permission to reproduce certain copy- 

 righted materials. Our Table 12 comes from Haldane's paper in the Biochemical 

 Journal ; Figure 41 and Table 3 and a part of Table 4 are from Hober, Physical 

 Chemistry of Cells and Tissues, courtesy of the Blakiston Co., Philadelphia; Figures 

 22-27 are from Strugger's Praktikum der Zell- und Gewebephysiologie, Gebriider 

 Borntraeger, Berlin. The latter also permitted reproduction of (our) Figures 33 and 

 36, and Tables 21, 22 and 24, appearing in the periodicals Jahrb. f. wiss. Bot. and 

 Protoplasma. The Canadian Journal of Research has permitted reproduction of our 

 Figure 10 from a paper by Babbitt. Our Table 17 is taken from a paper by Morse, 

 published by the Carnegie Institution of Washington ; to the Faraday Society we are 

 indebted for Table 10 and a portion of Table 4, from papers in the Transactions by 

 London and Porter respectively; Tables 8, 11, and 13 are reproduced from a paper 

 by Frazer and Myrick, courtesy The Journal of the American Chemical Society. By 

 permission of the Alacmillan Co., New York and London, we have copied (our) 

 Figure 50 from Fogg's paper in the periodical Nature, and Table 36 from Dixon's 

 monograph, Transpiration and the Ascent of Sap in Plants. The New Phytologist and 

 Dr. T. A. Bennet-Clark have allowed reproduction of Fig. 42 and Tables 30 and 34. 

 Figure 12 comes from Hildebrand's Solubility, Reinhold Publishing Co., New York ; 

 Figure 40 from a paper by Osterhout and Murray, by permission of the Rockefeller 

 Institute for Medical Research, New York; Tables 14, 15, and 16 from Berkeley, 

 Hartley and Burton in the Transactions of the Royal Society ; Table 45 after Leick 

 in Abderhalden's series on biological methods, published by Urban and Schwarzen- 

 berg, Berlin. Figures 11, 19, and 49 are copied from Meyer and Anderson's Plant 

 Physiology, copyright Van Nostrand Co., Inc., New York. 



Thanks are also due the following for authorization to quote from original publi- 

 cations : Dr. Matilda M. Brooks; The Faraday Society (Transactions); Journal 

 of Experimental Biology; Longmans, Green and Co., Inc., New York (Findley, Os- 

 motic Pressure) ; Reinhold Publishing Co., New York (Hildebrand, Solubility of 

 Non-Electrolytes) ; The Ronald Press Co., New York (Adolph, Physiological Regu- 

 lations) ; John Wiley & Sons, Inc., New York (Gortner, Outlines of Biochemistry, 

 2nd Ed.; Bull, Physical Biochemistry; Heuser, Cellulose Chemistry) ; Williams and 

 Wilkins Co., Baltimore (Chemical Reviews). 



Where other materials not listed above are used in the text, the source is indicated. 

 Unfortunately the authors were unable to contact a few authors and publishers. To 

 all whose published data were found useful the writers wish to express their gratitude. 



