IOWA ACADEMY OF SCIENCE 
xii 
PAGE 
v" The Paleontology and Stratigraphy of the Upper Carboniferous of Iowa, 
. Geo. L. Smith 273 
^The Loess of Peczel, Hungary, B. Shimek 285 
New Crinoid Fauna from Montieello, Iowa, A. O. Thomas 289 
/Some Unique Niagaran Cephalopods, A. O. Thomas..; 293 
A Design for Electrical Regulation of High Temperature Ovens, W. E. 
Tisdale 301 
Notes on the Production and Some Electrical Properties of Tellurium 
Crystals, W. E. Tisdale 303 
The Absence of Liberation or Absorption of Electrons During a Change 
from the Conducting to the Non-conducting State, L. E. Dodd. ... 307 
A Resonance Method for Measuring the Phase Difference of Condensers, 
H. L. Dodge 311 
The Crystal Phonopticon in its Adaptation to Enable the Blind to Read 
the Printed Page, F. C. Brown 317 
Notes on Certain Elastic Peculiarities of Phosphor Bronze Wires, L. P. 
Sieg and A. J. Oehler 321 
A Simple Device for Demonstrating the Terppered Scale, L. B. Spinney.. 327 
An Attempt to Detect a Change in the Heat Conductivity of a Selenium 
Crystal With a Change in the Illumination, L. P. Sieg. 329 
The Effect of Change of Lamp Voltage on Vision, Wm. Kunerth 333 
Psychology Applied to the Improvement of Control of the Pitch of the 
Voice in Singing, Carl J. Knock 337 
Psychology Applied to the Measurement of Merit of Advertisements, 
Harry H. Gould 339 
The Psychogram in Vocational Guidance, Carl E. Seashore 341 
Snakes “Swallowing” their Young, E. D. Ball 343 
The Crow, Fred Berninghausen 345 
Notes on Iowa Pentatomoidea, Dayton Stoner.' 347 
Notes on the Distribution of the Prairie Spotted Skunk in Iowa, B. H. 
Bailey 355 
The Building and Function of the College Museum, B. H. Bailey 358 
Macroscopic Fauna of a Small Brook, D. M. Brumfiel 363 
Is the Appetite of Swine a Reliable Indication of Physiological Needs, 
John M. Evvard 375 
