CONTENTS. 



No. 1, September 20, 1918. 



PAGE 



OsTERHOUT, W. J. v., and Haas, A. R. C. On the dynamics of 

 photosynthesis 1 



OsTERHOUT, W. J. V. A method of studying respiration 17 



Uhlenhuth, Eduard. The antagonism between thymus and 

 parathyroid glands 23 



Uhlenhuth, Eduard. Further proof of the existence of a spe- 

 cific tetany-producing substance in the thymus gland 33 



Packard, Charles. Difference in the action of radium on green 



plants in the presence and absence of light 37 



LoEB, Jacques. Amphoteric colloids. I. Chemical influence of 



the hydrogen ion concentration 39 



Brooks, S. C. A theory of the mechanism of disinfection, hemol- 

 ysis, and similar processes 61 



LoEB, Jacques. The law controlHng the quantity of regenera- 

 tion in the stem of Bryophyllum calycinum 81 



Moore, A. R. Reversal of reaction by means of strychnine in 



planarians and starfish 97 



Garrey, Walter E. Light and the muscle tonus of insects. 

 The heliotropic mechanism 101 



Boring, Alice M., and Morgan, T. H. Lutear cells and hen- 

 feathering 127 



No. 2, November 20, 1918. 



Harvey, E. Newton. Studies on bioluminescence. VII. Re- 



versibihty of the photogenic reaction in Cypridina 133 



Hecht, Selig. The photic sensitivity of Ciona intestinalis . . . . 147 



Osterhout, W. J. V. An indicator method of measuring the 



consumption of oxygen 167 



Osterhout, W. J. V. Comparative studies on respiration. I. 



Introduction 171 



V 



