CONTENTS. 



Calvin B. Bridges (by invitation): The developmental stages at which mutations 

 occur in the germ tract, i (1461). 



Arthur W. Thomas and Mabel E. Baldwin: Contrasting effects of chlorides and 

 sulphates on the hydrogen ion concentration of acid solutions. 2 (1462). 



Mary Swartz Rose: On the utilization of salep mannan. 3 (1463). 



H. C. Sherman, M. E. Rouse, B. Allen and E. Woods: Growth and reproduction 

 upon simplified food supply. 4 (1464). 



H. J. Muller and E. Altenburg: The rate of change of hereditary factors in 

 Drosophila. 5 (1465). 



Graham Lusk and H. V. Atkinson: The influence of lactic acid upon the meta- 

 bolism of the dog. 6 (1466). 



Gary N. Calkins: Rejuvenescence without encystment and without nuclear fusion 

 in Uroleptus? 7 (1467). 



R. W. Scott (by invitation) : The total carbonate content of the arterial and venous 

 plasma in normal individuals. 8 (1468). 



R. W. Scott (by invitation) : The total carbonate content of the arterial and venous 

 plasma in patients with chronic heart disease. 9 (1469). 



R. W. Scott (by invitation): The total carbonate content of the arterial and venous 

 plasma in patients with chronic pulmonary emphysema. 10 (1470). 



D. I. Macht, J. P. Greenberg and S. Isaacs: Concerning the influence of anti- 

 pyretics on the acuity of hearing. 11 (1471). 



J. Bronfenbrenner and M. J. Schlesinger: Serologic method for detecting in- 

 fection in foods. 12 (1472). 



J. Bronfenbrenner, D. Soletsky and M. J. Schlesinger: Further studies on 

 C R indicator. 13 (1473). 



Max Kahn: The protein and lipin content of blood serum of nephritic patients. 

 14 (1474). 



Arthur L. Tatum (by invitation): Method and results of a study of the distribu- 

 tion of iodine between cells and colloid of thyroid glands. 15 (1475). 



Jacob Rosenbloom: On the certain dietary factors to be considered in the treat- 

 ment of cases of hyperthyroidism. 16 (1476). 



The Proceedings of the Society for Experimental Biology and Medicine are 

 published as soon as possible after each meeting. Regular meetings of the Society 

 are held in New York on the third Wednesday of the months of October to May 

 Inclusive. A volume of the Proceedings consists of the numbers issued during an 

 academic year. 



The price of Vols. I, II and III is four dollars each, of Vol. IV to current 

 volume is two dollars each, postage prepaid. The price of copies of the proceedings 

 of any meeting is thirty cents each, postage prepaid. Subscriptions are payable in 

 advance. 



President — Gary N. Calkins, Columbia University. 



Vice-President — George B. Wallace, University and Bellevue Hospital Medical 

 College. 



Secretary-Treasurer — Holmes C. Jackson, University and Bellevue Hospital 

 Medical College. 



Additional members of the Council — Henry C. Sherman, Columbia University, 

 and J. W. Jobling, Columbia University, and ex-Presidents. 



Managing Editor — The Secretary-Treasurer. 338 East 26th St., New York City. 



