540 IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



Roots, see Werlge-work. Page 



Rosa praUucola Greene in Iowa, Evelyn Ensign 303 



Rust, See Clover, Mammoth. 



S 



Sawyer, M. Louise, Hybridization in Iris 363 



Schoewe, W. H., Interpretation of Certain Leached Gravel Deposits in 



Louisa and Washington Counties 393 



Selenium Crystals of the Hexagonal System, The Sublimation Curve 



for, L. E. Dodd 509 



Selenium Deposited by Condensation from the Vapor State Above the 



Melting Point, Some Structural Features of, L. E. Dodd 501 



Shimek, B., Further Notes on Helicina occulta Say 385 



Silurian, See Herpetocrinus. 



Solar Eclipse of June 8, 1918, D. W. Morehouse 527 



St. Louis Formation, Stratigraphic Delimitation of, Charles Keyes 471 



Stewart, G. W., The Action of Conical Horns 521 



The Binaural Difference of Phase Effect 522 



Stoner, Dayton, Some Interesting Insect Habitats in the Tropics 129 



Streptococci, Resistance of, to Germicidal Agents, Henry Albert 77 



Stroboscopic Velocities, Superposed, L. E. Dodd 513 



T 



Tellurium Crystals, The Effect of Temperature on Resistance and Spe- 

 cific Resistance of, Arthur R. Fortsch 523 



Tertiaries, See Bozeman. 



Thomas, A. O., An Illustration of the Wedge-work of Roots 477 



A Herpetocrinus from the Silurian of Iowa 481 



The Independence Shale Near Brandon 485 



Thomas, W. A., See Conard and Thomas. 



Thomisidse of the Ames Region, I. L. Ressler 151 



Tilton, John L., Note on Conditions at the Head of Flood Plains 391 



Tuttle, Flora May, Flora of Mitchell County 269 



A Naturalist's Glimpse of the Limberlost 301 



U 



Utah, See Bozeman, Tertiaries. 



V 



Voltage and Candle-power in Modern Incandescent Lamps, The Rela- 

 tion Between, Wm. Kunerth 517 



W 



Warts on Cottontail Rabbits, Occurrence of, J. E. Guthrie 157 



Wedge-work of Roots, An Illustration of, A. O. Thomas 477 



Werner, H. R., Variations in the Branches of the Coeliac Artery in 



the Rabbit 93 



Wheat Treated with Formaldehyde, Studies Upon the Absorption and 



Germination of, A. L. Bakke and H. H. Plagge -. 365 



Wolden, B. O., Moss and Lichen Flora of Western Emmet County 259 



Wood Fiber, Measurements of, H. S. Conard and W. A. Thomas 333 



