INDEX 677 



Vol. Page 

 Stephens, T. C, Bird Records During the Past Winter, 



1916-1917, in Northwestern Iowa XXIV, 245 



Bird Records of the Past Winter, 1917-1918, in the 



Upper Missouri Valley XXV, 71 



Notes on the Birds ot South Dakota, with a Pre- 

 liminary List for Union County ; XXV, 85 



Stern, See Tone Variation. 



Stewart, F. C, The Stomata and Palisade Cells of Leaves I, III, :?0 

 A Key for the Identification of the Weed Seeds Found 



in Clover Seeds I, ///, 84 



Effect of Heat on Germination of Corn and Smut II, 74 



and Carver, G. W., Inoculation Experiments with 



Gymnosporanghim macropus, Lk Ill, 162 



Stewart, George W., Concerning a Study of Kerosene Oils 



by Physical Methods XVII, 181 



Notes in Regard to Efficiencies of Luminous Flames XVIII, 113 

 Presidential Address, 1917, Recent Progress in 



Physics XXIV, 29 



Memorial of Robert B. Dodson XXV, 29 



See Stiles and Stewart. 



and Stiles, Harold, The Theory of Binaural Beats — an 



Experimental Contribution XXII, 18 



Stiles, Harold, The Use of the Rayleigh Disk in the 



Determination of Relative Sound Intensities XX, 279 



and Stewart, G. W., Certain Diffraction Experiments 



in Sound XXI, 6 



The Variation of Sound Intensity with Distance 

 from the Source; An Interesting Case of De- 

 viation from the Inverse Square Law XXI, 255 



See Stewart, G. W., and Stiles. 

 Stomata, See Leaves. 

 Stone Implement, See Implement. 



Mad, See Mad Stone. 

 Stoner, Dayton, Notes on Iowa Pentatomoidea. .XXII, 347; XXIII, 303 



Notes on Some Iowa Rodents XXIV, 353 



An Unusual Example of Incisor Growth in the West- 

 ern Fox Squirrel XXV, 105 



See Job and Stoner. 



Stones, Building, Analyses of, N. Knight VIII, 104 



Precious, in the Drift. G. A. Muilenburg XXI, 203 



Stookey, Stephen W., Memorial of Bert H. Bailey XXIV, 23 



Storage Battery, See Simpson College. 



Strophostylus, Evolution of, C. R. Keyes I, 71, 25 



Story County, See Flowers, Loess, Weed Survey. 

 Stotts, Alma M., See Nicholson and Stotts. 

 Stratigraphy, See Rocks. 



Striae, Glacial, in Iowa, W. H. Norton XVIII, 79 



Near Lamoni, T. J. Fitzpatrick V, 105 



Striation of Rocks, See Rocks. 



