CONTENTS 



Redfield, Alfred C, and Bright, Elizabeth M. Temperature 



coefficient of the action of /3-rays upon the egg of Nereis 255 



McClure, Charles F. W. On the experimental production of edema 



in larval and adult anura 261 



Harvey, E. Newton. Studies on bioluminescence. IX. Chemical 



nature of Cypridina lucif erin and Cypridina lucif erase 269 



Osterhout, W. J. v., and Haas, A. R. C. The temperature co- 

 efficient of photosynthesis 295 



Osterhout, W. J. V. Acomparativestudy of permeability in plants. 299 



Uhlenhuth, Eduard. Nature of the retarding influence of the 



thymus upon amphibian metamorphosis 305 



Uhlenhuth, Eduard. Parathyroids and calcium metabolism 315 



BoviE, W. T., and Hughes, D. M. Rate of recovery from the action 



of fluorite rays 323 



BoviE, W. T., and Klein, Alice. Sensitization to heat due to 



exposure to light of short wave-lengths 331 



Loeb, Jacques. The physiological basis of morphological polarity 



in regeneration. I 337 



Loeb, Jacques. Amphoteric colloids. HI. Chemical basis of the 



influence of acid upon the physical properties of gelatin 363 



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