CONTENTS 



Northrop, John H. A device for regulating the temperature of 



incubators either above or below room temperature 309 



Northrop, John H. Concerning the hereditary adaptation of organ- 

 isms to higher temperature 313 



Moore, A. R. Stereotropism as a function of neuromuscular 



organization 319 



Uhlenhuth, Eduard. Regeneration and neotony 325 



Brooks, Matilda Moldenhauer. Comparative studies on respira- 

 tion. X. Toxic and antagonistic effects of magnesium in rela- '| 

 tion to the respiration of Bacillus subtilis 331 



Hecht, Selig. Intensity and the process of photoreception 337 



Maxwell, S. S. Labyrinth and equilibrium. II. The mechanism 



of the dynamic functions of the labjnrinth 349 



Carey, Eben J. Studies in the dynamics of histogenesis. I. Tension 

 of differential growth as a stimulus to myogenesis 357 



Loeb, Jacques. The nature of the directive influence of gravity 



on the arrangement of organs in regeneration 373 



Loeb, Jacques. On the cause of the influence of ions on the rate 



of diffusion of water through coUodion membranes. 1 387 



Krafka, Joseph, Jr. The effect of temperature upon facet number 



in the bar-eyed mutant'of Drosophila. Part 1 409 



The Journal of General Physiology is issued bimonthly, one volume of about 600 

 pages appearing in a year. Contributions should be sent to the editors of The Journal 

 of General Physiology, Avenue A and 66th Street, New York, N. Y., or 60 Buckingham 

 Street, Cambridge, Mass. The papers should be limited preferably to twenty printed 

 pages, not counting the space occupied by illustrations. Authors receive 100 reprints 

 of their papers free of charge; additional copies may be obtained at cost. ~ 



The subscription price per year (one volume) is $5.00, payable in advance. Single 

 copies cost $1.00. Remittances should be made by draft or check on New York, or by 

 postal money order, payable to The Journal of General Physiology, Moimt Royal and 

 Guilford Avenues, Baltimore, Md., or Avenue A and 66th Street, New York, N. Y. 



