INDEX 



Page 



Asteroid 1909 JA. 13 



Ballistic Galvanometer, The Use of, and a Pendulum for Measuring Ra- 

 pidly Fluctuating Resistances 105 



Bering River Coal Field, Alaska, Some Features of 85 



Building a Museum 155 



Clover, Pollination of 35 



Coon Butte Region, Volcanic Phenomena of 99 



Cranial Nerves of Necturus Maculatus, The Peripheral Distribution of. 131 



Ecological Study of a Prairie Province in Central Iowa 55 



Efficiencies of Luminous Flames, Notes in Regard to 113 



Elastic Properties of Platinum-Iridium Wire, On the Recovery of 115 



Electrodeless Discharge, The Doppler Effect in 123 



Eolation Under the Stimulus of Aridity, The Depositional Phases of . . . .101 



Epinephrin, Action of, Upon the Muscle Tissue of the Vein 125 



Fungus Diseases of Trees 25 



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



Ta'ble of the Bearings of Glacial Striae in Iowa 79 



Illuminting Engineering — A New Profession 119 



In Memorium 11 



Iowa Reptiles, Notes on Some 149 



Iowa Saprophytes, Notes on 57 



Library, Exchanges in Academy 7 



Membership 4 



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



Myriophyllum Spicatum, The Flowers of 61 



Necturus, The Rank of. Among the Tailed Amphibians, As Indicated 



by the Distribution of its Cranial Nerves 137 



Nitrogen in Rain and Snow 75 



Ore Origin, Graphics of 95 



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



Program 5 



Quarter Centennial, Report of Committee on 3 



Red Clover, Studies in Variation of 47 



Secretary's Report 2 



Story County, The Flowers of 19 



Treasurer's Report 3 



Typhoid Fever, Vaccination Against 15 



