Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 19 (1912) > Annual Issue
Volume 19, Annual Issue (1912)
Front Matter
Title Page - Letter of Transmittal p. i-ii
L. S. Ross
Table of Contents p. x-xi
General Interest Articles
Proceedings of the Twenty-Sixth Annual Session of the Iowa Academy of Science: Staff & Committee Reports; Constitution of the Iowa Academy of Science as Amended to 1912; Program p. 1-9
L. S. Ross and G. F. Kay
President's Address: The Mission and Spirit of the Pure Scientist p. 11-15
Louis Begeman
Anniversary Address Iowa Academy of Science p. 17-25
Herbert Osborn
Charter Members of the Iowa Academy of Science p. 27-41
L. H. Parmmel
Twenty-Five Years of Botany in Iowa p. 43-63
Thomas H. MacBride
History of Geology in Iowa for the Last Twenty-Five Years p. 65-72
Melvin F. Arey
The Progress in Physics in Iowa in the Quarter Century p. 73-77
Frank F. Almy
The Progress of Zoology in Iowa During the Last Twenty-Five Years p. 79-83
C. C. Nutting
Greetings from Visiting Academies p. 85-89
L. H. Pammel, C. C. Nutting, A. E. Sheldon, and Henry B. Ward
Research
The Late Blight of Barley (Helminthosporium teres Sacc.) p. 93-102
A. L. Bakke
Simblum sphaerocephalum in Iowa p. 103-103
Henry S. Conard
Ferns and Liverworts of Grinnell and Vicinity p. 105-106
Henry S. Conard
Secotium agaricoides, a Stalked Puffball p. 107-108
Henry S. Conard
Behavior of Pollen Tubes in Richardia africana. p. 109-109
James Ellis Gow
An Anomalous Ovary p. 111-112
James Ellis Gow
Native Dye-Plants and Tan-Plants of Iowa, with Notes on a Few Other Species p. 113-128
Harriette S. Kellogg
Some Points on the Floral Development of Red Clover (Trifolium pratense) p. 129-129
J. N. Martin
Notes on Heteranthera dubia p. 131-132
Robert B. Wylie
The Effect of Continued Grinding on Water of Crystallization (Second Paper) p. 133-136
Nicholas Knight
Velocity Coefficients of the Reaction between Ethyl Iodide and Silver Nitrate in Ethyl and Methyl Alcohol and Mixtures of These Solvents p. 137-146
J. N. Pearce and O. M. Weigle
Sundry Provincial and Local Phases of the General Geologic Section of Iowa p. 147-151
Charles Keyes
Nether Delimitation of Our Carbonic Rocks p. 153-156
Charles Keyes
Arid Plateau-Plains as Features of Eolic Erosion p. 157-162
Charles Keyes
The First Reported Petrified American Lepidostrobus is from Warren County, Iowa p. 163-165
John L. Tilton
The Salem Limestone and Its Stratigraphic Relation in Southeastern Iowa p. 167-168
Francis M. Van Tuyl
The Origin of the Geodes of the Keokuk Beds p. 169-172
Francis M. Van Tuyl
A Study of the Cherst of the Osage Series of the Mississippian System p. 173-174
Francis M. Van Tuyl
Evidence Favoring the Radioactive Disintegration of Sodium as an Element p. 175-178
F. C. Brown
The Effect of Rupture by Abrasion on the Electrical Conductivity of Selenium p. 179-184
F. C. Brown
A New Apparatus for Measuring Small Intervals of Time Independent of Clock or Chronograph p. 185-188
F. C. Brown
A Method of Determining Whether the Restoring Torque is Proportional to the Torsional Strain During the Vibration of a Torsion Pendulum p. 189-190
L. P. Sieg
The Occurrence of Melanism in the Broad Winged Hawk (Buteo latissimus) p. 191-192
B. H. Bailey
Notes of the Food of the Black Crowned Night Heron in Captivity p. 193-193
B. H. Bailey
A Remarkable Flight of Broad Winged Hawks p. 195-196
B. H. Bailey
The Harvest Mouse in Iowa p. 197-197
Frank C. Pellett
Food Habits of Red-Tailed Hawk, Cooper Hawk, and Sparrow Hawk p. 199-201
Frank C. Pellett
Notes on a Collection of Mammals from Northwestern Iowa p. 203-205
Alexander G. Ruthven and Norman A. Wood
Contribution to the Herpetology of Iowa, II p. 207-207
Alexander G. Ruthven
A Study in Insect Parasitism p. 209-213
R. L. Webster
The Source of the Chromaffin Cells of the Adrenals of the Pig p. 215-216
Mildred Yule
A Systematic Outline of the Reduviidae of North America p. 217-252
Stanley R. Fracker
Early Iowa Locality Records p. 253-257
B. Shimek
Back Matter
