CONTENTS 
Page 
Physics. — The Diffusion of Air through Water in the Lapse of Years . . . 
By C. Barus 133 
Genetics. — The Influence of Age on Fertility in Swine 
By T. Ellinger 134 
Genetics. — Variation and Inheritance in Size in Trypanosoma lewisi 
By W. H. Taliaferro 138 
Astronomy. — Measurement of the Diameter of Alpha-Orionis by the In- 
terferometer . By A. A. Michelson and F. G. Pease 143 
Mathematics. — An Overlooked Infinite System of Groups of Order pq % . . . 
' • By G. A. Miller 146 
Genetics. — The Globe, a Simple Trisomic Mutant in Datura 
By A. F. Blakeslee 148 
Astronomy. — Studies of Magnitudes in Star Clusters. XIII. Variable 
Stars in N. G. C. 7006 By H. Shapley and B. W. Mayberry 152 
Zoology. — The Skin Temperature of Pachyderms 
By F. G. Benedict, E. L. Fox and M. L. Baker 154 
