Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 30 (1923) > Annual Issue
Volume 30, Annual Issue (1923)
Front Matter
Title Page - Front Matter p. 1-2
Table of Contents p. 12-16
General Interest Articles
In Memoriam: Gustavus Detlef Hinrichs; James Edward Todd p. 28-42
Charles Keyes
The Address of the President - Botanical Notes on Fiji and New Zealand p. 45-54
Robert B. Wylie
Research
The Structure of Some Nectar Glands of Iowa Honey Plants p. 301-329
William S. Cook
The Progress of Research in the Coe College Radiological Laboratory p. 55-58
Scott W. Smith Jr.
Calibration of a Gold Leaf Electrometer for Ionization Work p. 59-62
LeRoy D. Weld
An Extension of Acoustic Wave Filter Theory p. 63-63
G. W. Stewart
Demonstration of the Variable Character of the Vowel E p. 64-64
G. W. Stewart
New Vibrations within a Conical Horn p. 65-66
Victor A. Hoersch
The "K" and "L" X-Ray Spectra of Tungsten p. 67-70
Charles B. Crofutt
A Simple High Frequency Alternator p. 71-71
C. J. Lapp
The Trace Left by a Helical Beam of Electrons on a Plane Perpendicular to Its Axis p. 72-74
C. J. Lapp
The Light-Energy of 2536A Required to Render Developable a Grain of Silver Bromide p. 75-75
P. S. Helmick
The Natural Ultra-Violet Frequency of Silver Bromide p. 75-76
P. S. Helmick
The Reflecting and the Absorbing Power of a Photographic Emulsion p. 76-76
P. S. Helmick
The Distribution of Intensity in the Broadened Balmer Lines of Hydrogen p. 77-77
E. O. Hulburt
Magnetic and Natural Rotatory Dispersion in Absorbing Media p. 78-78
E. O. Hulburt
The Deflection of a Stream of Electrons by Electromagnetic Radiation p. 78-78
E. O. Hulburt
On Super-Regeneration p. 78-78
E. O. Hulburt
Standards of Capacity p. 79-79
J. B. Dempster, E. G. Linder, and E. O. Hulburt
Production of High Amperage in Low Voltage Coolidge Tube p. 80-80
R. V. Zumstein
A Calculation of the Bulk Modulus of the Earth p. 81-82
L. P. Sieg
A Summary of Recent Experiments on the Relation between Direct and Calculated Refecting Powers of Crystals of Tellurium p. 83-83
L. P. Sieg
Acoustic Wave Filters in Solids p. 83-83
V. C. Hall
The Torques and Forces between Short Cylindrical Coils Carrying Undamped Alternating Currents of Radio Frequency p. 84-86
W. A. Parlin
The Genus Empoasca in North America p. 87-133
Albert Hartzell
On the Function of the Paddle of the Paddlefish p. 135-137
H. W. Norris
A New Apparatus for Measuring Deep Water Temperatures p. 139-142
Frank A. Stromsten
A Zoological Park in New Zealand p. 143-145
Dayton Stoner
The 1918 Outbreak of Sod Webworms in Iowa p. 147-149
R. L. Webster
Observations on Sphenodon punctatum in Captivity p. 151-155
Wendell Krull
An Instance of Polymely in the Frog p. 157-161
Albert Kuntz
Fish Foods in Relation to Fish Culture p. 163-166
Willis De Ryke
Food of the Short-Nosed Gar-Pike (Lepidosteus platystomus) in Lake Okoboji, Iowa p. 167-170
George E. Potter
Vitamin Deficiency Studies : 1. The Relation of Vitamin Deficiency to Muscle Fatigue in Rats p. 171-171
V. E. Nelson, F. M. Baldwin, Anna Gertrude Riggs, and Marjorie Cunningham
Comparative Rates of Oxygen Consumption in Marine Forms p. 173-180
Francis M. Baldwin
Some Food Reactions of Snails p. 181-184
E. W. Johns
The Role of the Vagi of Gastric Motility in Necturus maculatus p. 185-187
T. L. Patterson
The Banana Snake Boa imperator p. 189-196
J. E. Guthrie
The Terrestrial Isopods of Iowa p. 197-199
Mayne Longnecker
The Flora of the Olympic Peninsula, Washington p. 201-243
Albert B. Reagan
The Losses of Calcium from the Newton Experimental Field p. 245-253
Winfield Scott
What is the Relation between the Moisture Content and Viability of Seed Corn When Subjected to Low Temperatures? p. 254-262
Winfield Scott
The Flora of Pine Hollow, Dubuque County, Iowa p. 263-277
L. H. Pammel
Some Notes on Plants of Whitehall, Michigan p. 279-285
L. H. Pammel and R. I. Cratty
Germination Studies of Some Trees and Shrubs p. 287-293
L. H. Pammel and C. M. King
A Day near Muskogee, Oklahoma p. 295-296
L. H. Pammel
The Occurrence of Juniperus horizontalis in Floyd County near Rockford p. 297-300
L. H. Pammel
Studies of the Cytology of Melilotus alba p. 331-331
E. F. Castetter
Notes on Introduced Plants p. 333-336
Robert B. Wylie
Plants and the Surface Film of Water p. 337-343
Robert B. Wylie
Polygonum in the State of Iowa p. 345-349
G. L. Wittrock
Cuscuta in Iowa p. 351-354
G. L. Wittrock
Citation of Authorities for Latin Names p. 355-357
Henry S. Conard
The Arborescent Flora of Midwest Farmsteads p. 359-364
T. J. Fitzpatrick
Some Polypores in Henry County p. 365-365
Mary Carnahan
Some Conditions Affecting Tree Growth as Revealed by the Annual Rings p. 367-368
Max W. Van Horn
Methods of Modeling the Agaricaceae p. 369-374
Kathryn Gilmore
Substances Dissolved in Rain and Snow p. 375-378
H. S. Fries and Nicholas Knight
Equilibrium between Strontium Bromide and Bromine in Aqueous Solutions of Strontium Bromide p. 379-385
J. N. Pearce and J. V. O'Leary
The Free Energy of Dilution and the Activities of the Ions of Hydrogen Iodide in Aqueous Solutions p. 387-397
J. N. Pearce and A. R. Fortsch
Synthetic Hypnotics in the Barbituric Acid Series p. 399-409
Arthur W. Dox
The Effect of Impurities on the Physical Properties of Oxychloride Cements p. 411-422
H. L. Olin and Ben H. Peterson
Electrometric Titration of Iodate, Bromate, Chlorate and Ferricyanide with Titanous Sulfate p. 423-423
W. S. Hendrixson
An Excellent Example of High Clay Bank Erosion in Lee County, Iowa p. 425-431
Ben H. Wilson
Fossil Annelid Jaws from the Iowa Devonian p. 433-436
Walter V. Searight
Notes on the Occurrence of a Black Bituminous Shale near Palo, Linn County, Iowa p. 441-443
Glenn S. Dille
An Unusual Well Record in Northwestern Iowa p. 445-450
James H. Lees
Lake Huron Winter Beach Forms p. 451-453
Max Littlefield
Apparent Fossil Fruits from the Fort Union Beds of North Dakota p. 455-458
Merrill A. Stainbrook
Extracts form the Experiences of a Well Digger p. 459-462
J. M. Lindly
The Geographic Distribution of Iowa Devonian Echinoderms p. 463-465
A. O. Thomas
Some Large Colonies of Stromatopora Found near Iowa City, Iowa p. 467-470
A. O. Thomas
Some Fossils from an Outcrop in Des Moines p. 471-483
A. O. Thomas
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