622 INDEX 



Vol. Page 

 Contributions to a Knowledge of the Thripidge of 



Iowa Ill, 21i 



See Pammel and Beach. 

 Beardshear, William Miller, Memorial of, L. H. Pammel. . X, 22 



Beats, Binaural Theory of, G. W. Stewart and H. Stiles.. XXII, 18 



Beetle, Long-Lifed Woodboring, H. E. Jaques XXV, 175 



Begeman, Louis, A Convenient Voltaic Cell XI, 195 



J. J. Thomson's Theory of Matter XII, 49 



Mutual Induction and the Internal Resistance of a 



Voltaic Cell XIII, 219 



Determination of the Charge of an Electron by Wil- 

 son's Method, Using Radium XV, 157 



Nucleations According to Barus XV, 165 



The Mission and Spirit of the Pure Scientist, Presi- 

 dential Address, 1912 XIX, 11 



Beggiatoa alba and the Dying of Fish in Iowa, L. H. Pam- 

 mel I, /, 90 



Bell's Vireo, See Vireo. 



Bennett, Walter W., Bell's Vireo Studies (Vh-eo helli 



Aud.) XXIV, 285 



Bennettites (lacotcnsis Macbride, Geological Postion of, S. 



Calvin I, IV, 18 



Benzidine, Behavior of, toward Selenic and Telluric Acids, 



A. W. Dox XXIV, 537 



Berberidacese, Seeds and Fruits of, L. H. Pammel, J. R. 



Burnip and Hannah Thomas V, 209 



Bering River Coal Field, Alaska, G. F. Kay XVIII, 85 



Bermudas as Collecting Ground for Invertebrates, H. A. 



Cross, Jr XXIV. 301 



Berninghausen, Fred, Helpful and Harmful Iowa Birds.. XX, 295 



Nature and Birds XXI, 7 



The Crow XXII, 345 



How a Tree Grows XXIII. 315 



Berry, E. M., and Bunch, C. C, The Influence of Intensity 



Ratio on Binaural Sound Localization XXIV, 203 



Berry, Geo. H., A List of the Lepidoptera of Linn County XXI, 279 

 Bessey, Charles E., Forest Trees of Eastern Nebraska. . . . XIII, 75 



Bessey, Charles Edwin, Memorial of. L. H. Pammel XXII, 11 



Bethany, Proper Use of Term. J. L. Tilton XX, 207 



Betulaceae of Iowa, T. J. and M. F. L. Fitzpatrick VIII, 169 



Beyer, Samuel Walker. Evidence of a Sub-Aftonian Till 



Sheet in Northeastern Iowa IV, 58 



Buried Loess in Story County VI, 117 



Bigelow, Cassie M., Study of Glands in the Hop-tree II, 138 



Binaural Beats, See Beats. 



Biological Station, See Illinois, Montana. 



Bird Records in Winter of 1916-1917. in Northwestern 



Iowa, T. C. Stephens XXIV, 245 



Of Winter of 1917-1918 in Upper Missouri Valley, T. C. 



Stephens XXV, 71 



