TITLES OR PAPERS PRESENTED 
11 
The Dependence of the Resistance of Silver Films upon the Method 
of Deposition. G. R. Wait 205 
A Photographic Determination of the Form of an Airplane Loop and 
the Dynamics of the Loop. L. P. Sieg 207 
< A New High Frequency Tone Generator. C. W. Hewlett 215 
]The Perception of Binaural Phase Difference not Caused by an In- 
} tensity Effect. G. W. Stewart.. ... 217 
The Frequency Limit of the Binaural Phase Difference and Intensity 
Effects. G. W. Stewart 218 
Note on the Principle of Similitude. I. Maizlich 
A Table of the Total Number of Stroboscopic Velocity Curves for 
any of the Natural Numbers from 1 to 500 Inclusive Taken as a 
Limiting Value of n and m. L. E. Dodd 219 
On Finding the Equation of the Characteristic Blackening Curve of 
a Photographic Plate. P. S. Helmick 223 
The Stereoscope in Teaching Physics and Geometry. LeRoy D. Weld 
The Overtones of Air Columns. L. B. Spinney 
The Comparative Stability of Colors in Wallpaper. J. M. Lindly 225 
Psychology 
Symposium ; Some Results of Current Research in the Psychological 
Laboratory of the State University. Introduced by C. E. Seashore 
The Talent Survey in Our Music School. Esther Allen Gaw 227 
The Normal Curve of Acuity in Hearing. Paul B. Anderson. 229 
The Iowa Pitch Range Audiometer. C. C. Bunch 230 
The Localization of Sound by Wave Phase in the Open Air. Henry 
M. Halverson 230 
What Constitutes Voice. Carl I. Erickson 232 
The Application of the Mendelian Law to Talent in Music. Hazel M. 
Stanton 
The Personal Equation in Motor Capacities. Martin L. Reymert 233 
Serial Action as a Basic Measure of Motor Capacities. C. F. Hansen. 234 
The Measurement of Motility in Children. Lillian Tow 235 
The Selection of Talent for Stenography and Typing. B. W. Robinson 236 
A Measure of Capacity for Acquiring Skill in Coordination of Eye 
and Hand. Wilhelmine Koerth 237 
A Standardized Measure of Motility. Merrill J. Ream 238 
Zoology 
A Study of Sociality in the Madreporaria. H. J. Wehman and Ger- 
trude Van Wagenen 241 
Descriptive Notes Concerning the American Bald Eagle. Ben Hur 
Wilson 
Some Impressions Obtained from a Review of Professor Nutting’s 
Narrative of the Barbados- Antigua Expedition. A. C. Trowbridge. 
Some Experiences with the Laboratory Control Field Water Supplies. 
Jack J. Hinman.. 253 
