514 PROCEEDINGS OF THE AMERICAN ACADEMY. 



9. The method employed for determining the adjustments of an or- 

 ganism gives an approximate physiological indication of the internal 

 chemical organization of the cell. 



10. The relation of physiological salts to the cell depends upon the 

 "constitutive proportions" of the salts in the cell. The effects of these 

 salts upon division are in general produced through their influence on 

 metabolism, but with specific differences of intensity in each case. Po- 

 tassic chloride, used alone, is the only one that has been observed to 

 exert a qualitative effect upon division. 



11. The cells of Stentor are probably permeable to the chlorine ions. 



12. The extrusion of coloring matter by Stentor is not directly due to 

 osmotic action. 



13. The precipitation of the coloring matter by neutral salts suggests 

 that it may be a proteid. 



XII. BlBLIOGRAPHT. 

 Dammar, O. 



'94. Handbiich der anorganischen Chemie. Stuttgart. Bd. 2, Th. 2, 

 xiii + 966 pp. 

 Forster, J. 



'73. Versnche iiber die Bedeutung der Aschenbestandtheile in der 

 Nahrung. Zeitschr. f. Biol., Bd. 9, pp. 297-380. 

 Hamburger, H. J. 



:02. Osmotischer Druck und lonenlehre in den medicinischen Wissen- 

 schaften. Zugleich Lehrbuch physikalisch-chemischer Metho- 

 den. Wiesbaden. J. F. Bergmann. Bd. 1, xiii + 539 pp. 

 Herbst, C. 



'92, Experimentelle Untersuchungen iiber den Einfiuss der verjinderten 

 chemischen Zusammensetzung des umgebenden Mediums auf die 

 Entwicklung der Thiere. Theil I. Versuche an Seeigeleieru. 

 Zeitschr. f. Wiss. Zool., Bd. 55, pp. 446-518. Taf. 19, 20. 

 Herbst, C. 



"93. Experimentelle Untersuchungen, etc. Theil II. Weiteres iiber 

 die morphologische Wirkung der Lithiumsalze und ihre theo- 

 retische Bedeutung. Mitth. Zool. Sta. Neapel., Bd. 11, pp. 136- 

 220. Taf. 9, 10. 

 Herbst, C. 



'96. Experimentelle Untersuchungen, etc. Theil III. Ueber das 

 Ineinanderfrreifen von normaler Gastrulation und Lithiumen- 

 twicklung (Zuchtung von Lithiumlarven mit Entodarm und 

 Mund). Theil IV. Die formative Wirkung des Lithiums auf 

 befruchtete Eier von Asterias glacialis. Theil V. Ueber die 



