IOWA ACADEMY OF SCIENCE 



TABLE OF CONTENTS 



Page 



Letter of Transmittal iii 



Officers of the Academy v 



Members of the Iowa Academy of Science vi 



Table of Contents x 



Report of Secretary 2 



Treasurer's Report. Report of Committee on Quarter Centennial 3 



Report of Committee on Membership 4 



Program 5 



Exchanges in Academy Library 7 



In Memoriam 11 



Asteroid 1909 JA 13 



Vaccination Against Typhoid Fever 15 



Flowers of Story County 19 



Some Fungus Diseases of Ti'ees 25 



Pollination of Clover 35 



Studies in Variation of Red Clover 47 



An Ecological Study of a Prairie Province in Central Iowa 55 



Notes On Iowa Saprophytes 57 



The Flowers of Myriophyllum Spicatum 61 



Nitrogen in Rain and Snow 75 



Glaciated Rock Surfaces near Linn and near Quarry, Iowa, with a 



Table of the Bearings of Glacial Striae in Iowa 79 



Some Features of the Bering River Coal Field, Alaska 85 



Problems on the Border Line Between Geology and the other Sciences. . 93 



Graphics of Ore Origin 95 



Volcanic Phenomena of Coon Butte Region, Arizona 99 



Depositional Phases of Eolation Under the Stimulus of Aridity 101 



The Use of the Ballistic Galvanometer and a Pendulum for Measuring 



Rapidly Fluctuating Resistances 105 



Notes in Regard to Efficiencies of Luminous Flames 113 



On the Recovery of the Elastic Properties of a Platinum-Iridium Wire. 115 



Illuminating Engineering — A new Profession 119 



The Doppler Effect in Electrodeless Discharge 123 



The Action of Epinephrin upon the Muscle Tissue of the Vein 125 



The Peripheral Distribution of the Cranial Nerves of Necturus Macu- 



latus 131 



The Rank of Necturus Among the Tailed Amphibians as Indicated by 



the Distribution of its Cranial Nerves 137 



Notes on Methods for the Study of Amphibian Eggs and Larvae 145 



Notes on Some Iowa Reptiles 149 



Building a Museum 155 



Index 161 



