534 BOTANICAL GAZETTE [JUNE 
LITERATURE CITED 
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2. HéseER, R., Ein zweites Verfahren, die Leitfahigkeit in Innern von Zellen 
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3: : essungen der innern Leitfaihigkeit von ar Dritte 
Mitteilung. Pfliigers Arch. Gesam. Physiologie 150: 15-45. 
4. Livincston, B. E., A quarter century of growth in ee “phyaibleg 
Plant World 2031-15. 1917. 
Moore, B., and Roar, H. E., Direct measurements of the osmotic pressure 
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Moors, B., Roar, H. E., and Wesster, T. A., Direct measurement of the 
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. OsteRHOUT, W. J. V., Uber den Temperatur Koeffizenten des elektviacees 
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‘ , Does the temperature coefficient of puenineies indicate that it is 
chientcal in nature? Bor. GAz. 63:317-320. 1917 
9. PFEFFER, W., Osmotische Untersuchungen. Leipzig. 1877. 
, Zur Kenntnis der sense und der ativhlen: Abh. Sichs. 
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11. ———, The physiology of ee (English trans.). Vol. 1. Oxford. 1900. 
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226-242. 1914. 
, Studies in permeability. I. The exosmosis of aS as a 
bien of antagonistic ion action. Ann. Botany 29:349-367- 
, Studies in permeability. II. The effect of jonas on the 
Sectaeabalily of plant cells to the ediecen | ion. Ann. Botany 29:611-618. 
IQI5. 
15. ———, Studies in permeability. IV. The action of various organic 
substances on the permeability of the plant cell, and its bearing on Czapek’s 
theory of the plasma membrane. Ann. Botany 31:47—-76. 1017 
———, Studies in permeability. V. The swelling of plant tissue in water 
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17. DE Vries, H., Eine Methode zur Analyse der Turgorkraft. Jahrb. Wiss. 
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, Plasmolytische Studien iiber die Wand der Vacuolen. Jahrb. 
Wiss. Bot. 16:465-598. 1885. 
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