Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 27 (1920) > Annual Issue
Volume 27, Annual Issue (1920)
Front Matter
Title Page - Front Matter p. 1-2
Table of Contents p. 9-12
General Interest Articles
Presentation of the Calvin Memorial Portrait; Addresses Pertaining to the Presentation of the Calvin Memorial Portrait p. 23-32
Thomas H. Macbride, L. H. Pammel, M. F. Arey, B. Shimek, A. O. Thomas, and Edgar R. Harlan
In Memoriam: Herbert R. Werner; R. Ellsworth Call p. 34-40
Albert Hartzell and Charles Keyes
The Address of the President - The Taxonomic Unit p. 41-50
T. C. Stephens
Research
Notes on Some Plants of the Arapahoe National Forest and Rocky Mountain National Park p. 51-73
L. H. Pammel and R. I. Cratty
The Germination of Some Trees and Shrubs and Their Juvenile Forms p. 75-80
L. H. Pammel and C. M. King
The Teaching of Plant Pathology p. 81-84
W. H. Davis
The Vegetation of Cape Blanco p. 85-89
Morton E. Peck
The Major Vegetation of Lake Okoboji p. 91-97
Robert B. Wylie
Some Alaska Fungi p. 99-108
J. P. Anderson
Notes on the Distribution of Midsummer Bee Plants in the Mississippi Zone of Clayton County p. 109-121
Ada Hayden
Comparison of Absorption Occuring in Corn Stalk Tissue and in Prepared Biocolloids p. 123-127
L. E. Yocum and A. L. Bakke
The Mechanical Penetration of the Sweet Corn Pericarp p. 129-132
R. A. Rudnick and A. L. Bakke
The Downy Brome Grass in Iowa p. 133-135
H. E. Jaques
The Relation of the Smaller Forest Areas in Non-Forested Regions to Evaporation and Movement of Soil Water p. 137-157
Irwin T. Bode
Nitrogen and Other Compounds in Rain and Snow p. 159-164
Jacob E. Trieschmann and Nicholas Knight
Soft Water of Central New York p. 165-166
Nicholas Knight and J. B. Shumaker
The Use of the Terms Flint and Chert p. 167-173
Waldo S. Glock
Agricultural Geology p. 175-179
John E. Smith
A Field of Eskers in Central Iowa p. 180-180
John E. Smith
A Note on A Sink Hole p. 181-183
E. J. Cable
A Note of Progress on the Study of the Iowan-Wisconsin Borders p. 184-186
E. J. Cable
The Conservation of Underground Waters p. 187-196
James H. Lees
The Taxonomy of Algebraic Surfaces p. 197-198
R. P. Baker
Vacuum Tube Circuits as a Source of Power for Conductivity Measurements p. 199-201
H. A. Geaque and F. Paul Ralston
The Hall Effect and the Specific Resistance of Thin Silver Films p. 203-204
G. R. Wait
The Dependence of the Resistance of Silver Films upon the Method of Deposition p. 205-206
G. R. Wait
The Photographic Determination of the Form of an Airplane Loop, and the Dynamics of the Loop p. 207-213
L. P. Sieg
A New High Frequency Tone Generator p. 215-216
C. W. Hewlett
The Perception of Binaural Phase Difference Not Caused by an Intensity Effect p. 217-217
G. W. Stewart
The Frequency Limits of the Binaural Phase Difference and Intensity Effects p. 218-218
G. W. Stewart
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 p. 219-222
L. E. Dodd
On Finding the Equation of the Characteristic Blackening Curve for a Photographic Plate p. 223-224
P. S. Helmick
The Comparative Stability of Colors in Wallpaper p. 225-226
J. M. Lindly
Symposium: Some Results of Current Research in the Psychological Laboratory of the State University of Iowa p. 227-227
C. E. Seashore
The Talent Survey in Our Music School p. 227-228
Esther Allen Gaw
The Normal Curve of Acuity in Hearing p. 229-229
Paul B. Anderson
The Iowa Pitch Range Audiometer p. 230-230
C. C. Bunch
The Localization of Sound by Wave Phase in the Open Ear p. 230-233
Henry M. Halverson
What Constitutes Voice? p. 232-233
C. I. Erickson
The Personal Equation in Motor Ability p. 233-234
Martin L. Reymert
Serial Action as a Basic Measure of Motor Capacity p. 234-235
C. Frederick Hansen
The Measurement of Motility in Children p. 235-236
Lillian Tow
The Selection of Talent for Stenography and Typing p. 236-237
Benjamin W. Robinson
A Measure of Capacity for Acquiring Skill in Coordination of Eye and Hand p. 237-238
Wilhelmine Koerth
A Standardized Measure of Motility p. 238-239
Merrill J. Ream
A Study of Sociality in the Madreporaria p. 241-252
Gertrude Van Wagenen and H. J. Wehman
Some Experiences with Laboratory Control of Field Water Supplies p. 253-257
Jack J. Hinman Jr.
Swimming Pool Sanitation p. 259-264
Jack J. Hinman Jr.
Cladocera of the Okoboji Region p. 265-268
Frank A. Stromsten
Copepoda of the Okoboji Region p. 269-270
Frank A. Stromsten
The Rotatoria of the Lake Okoboji Region p. 271-285
Dwight C. Ensign
Susceptible and Resistant Phases of the Dividing Sea-Urchin Egg when Subjected to Various Concentrations of Lipoid-Soluble Substances, Especially the Higher Alcohols p. 287-300
Francis Marsh Baldwin
Notes on the Branches of the Aorta (Arcus Aortae) and the Subclavian Artery of the Rabbit p. 301-310
Francis Marsh Baldwin
The Relative Position of the Maxima Contractions of the Amphibian Muscle When Subjected to Various Ranges in Temperature p. 311-318
Ralph L. Parker
Some Iowa Records of Lepidoptera p. 319-335
A. W. Lindsey
A Study of the Phylogeny of the Anteoninae p. 337-341
F. A. Fenton
Recent Army Worm and Variegated Cutworm Outbreaks in Iowa p. 343-351
H. E. Jaques
A Biological Reconnaissance of the Okefinokee Swamp in Georgia: The Fishes p. 353-377
E. L. Palmer and A. H. Wright
Bird Records for the Season 1919-1920 in the Vicinity of Iowa City p. 379-384
Dayton Stoner
An Intensive Ornithological Survey of a Typical Square Mile of Cultivated Prairie p. 385-393
Arthur R. Abel
Bird Records of the Past Two Winters, 1918-1920, in the Upper Missouri Valley p. 395-407
T. C. Stephens
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