CONTENTS 
Page 
Physiology. — Effects of a Prolonged Reduction in Diet on 25 Men. I. In- 
fluence on Basal Metabolism and Nitrogen Excretion 
By Francis G. Benedict and Paul Roth 149 
Physiology. — Effects of a Prolonged Reduction ln Dlet on 25 Men. II. 
Bearing on Neuro-Muscular Processes and Mental Condition 
By Walter R. Miles 152 
Physiology.' — Effects of a Prolonged Reduction ln Dlet on 25 Men. III. In- 
fluence on Efficiency During Muscular Work. By H. Monmouth Smith 157 
Zoology.' — Possible Action of the Sex-Determining Mechanism 
By C. E. McClung 160 
Geology. — The Study of the Sediments as an Aid to the Earth Historian . 
By Eliot Blackwelder 163 
Zoology.— The Growth of the Alaskan Fur Seal Herd Between 1912 and 
1917 ByG.H. Parker 168 
Pathology. — The Destruction of Tetanus Antitoxin by Chemical Agents . . 
By W. N. Berg and R. A. Kelser 174 
Minerology. — Tests for Fluorine and Tin in Meteorites with Notes on 
Maskelynite and the Effect of Dry Heat on Meteoric Stones .... 
By George P. Merrill 176 
Chemistry.— Notes on Isotopic Lead. . . . . By Frank Wigglesworth Clarke 181 
