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12. Grafe, Viktor-, Ernahrungsphysiologischcs Praktikum npherer Pfianzen. 

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13. Haas, A. R. C., Rapid respiration after death. Proc. Nat. Acad. Sci. 

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14. Ives, S. A., Unpublished work at Hull Botanical Laboratory. 



15. Kidd, Franklin, The controlling influence of carbon dioxide in the 

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16. Koch, W., Methods for the quantitative chemical analysis of animal 

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18. Michaelis, Leonor, Die Wasserstoflionenkonzentralion. Berlin. 1914. 



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22. Rose, R. C., After-ripening and germination of seeds of Til in, Sambucus, 

 and Rubus. Bot. Gaz. 68:281-308. 1919. 



23. Schroder, G., Uber die Austrocknungsfahigkeit des Pfianzen. Untcrsuch. 

 Bot. Inst. Tubingen 2:1-52. 1886. 



