10 
IOWA ACADEMY OP SCIENCE 
A Design for Electrical Regulation of High Tern-] 
perature Ovens [ 
Notes on Production, and Some Electrical Proper- [ W. E. Tisdale 
ties of Tellurium Crystals J 
A Resonance Method for Measuring the Phase Difference of 
Condensers H. L. Dodge 
The Theory of Binaural Beats. — An Experimental Contribution 
G. W. Stewart and Harold Stiles 
Experimental Evidence of Absence of Liberation and Absorption 
of Electrons in a Change from the Electrically Conducting to 
the Electrically Non-Conducting State L. E. Dodd 
The Crystal Optiphone in its Adaptation to Enable the Blind to 
Read the Printed Page through Ear Impressions P. C. Brown 
The Variation, with Temperature, of the Light-Sensitiveness of 
Selenium Crystals Kathryn J. Dieterich 
The Wave-Length Sensibility Curves of Selenium Blocks 
E. O. Dieterich 
Phychology Applied to the Improvement of Control of the Pitch of 
the Voice in Singing. .Carl J. Knock, Introduced by C. E. Seashore 
Psychology Applied to Measurement of Merit in Advertisements.. 
Harry H. Gould, Introduced by C. E. Seashore 
The Psychogram in Vocational Guidance C. E. Seashore 
A Bacteriological Study of the Wells of Toledo, Iowa 
W. H. Lauderdale and L. A. Kenoyer 
Preliminary Notes on the Animal Ecology of Johnson County 
D. M. Brumfiel, Introduced by Gilbert L. Houser 
Anatomy of the Lymphatic System in the Adult Rat 
Thesle T. Job, Introduced by Gilbert L. Houser 
Notes on the Development of the Lymphatic System of Turtles 
Prank A. Stromsten 
The Present Status of the Hessian Ply in Iowa R. L. Webster 
Tracheal Capillaries of the Grasshopper L. S. Ross 
The Inheritance of Pertility in Swine Edward N. Wentworth 
Is the Appetite of Swine a Reliable Indication of Physiological 
Needs? John M. Eward 
Notes on Iowa Pentatomoidea. Dayton Stoner 
The Crow Pred Berninghausen 
On Snakes “Swallowing” Their Young E. D. Ball 
Notes on the Distribution of the Prairie Spotted Skunk in Iowa. . 
.B. H. Bailey 
The Building and Function of the College Museum B. H. Bailey 
Ictinia Mississippiensis in Nebraska B. H. Bailey 
(Published in full in the Wilson Bulletin of Oberlin College.) 
