684 INDEX 



Vol. Page 

 Warren County, Origin of Present Drainage System of, J. 



L. Tilton 1, 77, 31 



See Lepidostrobus. 

 Washington, Western, Tramping in, T. H. Macbride . . . . XX, 11 



See Okanogan Valley. 

 Wasps, See Polistes metricus. 



Water, Ammonia Free, Preparation of, for Water Analy- 

 sis, J. B. Weems, C. E. Gray, and E. C. Myers X, 112 



Analysis of, for Railway Engines, C. 0. Bates.... 1,7/7, 27 



Bacteriological Analysis of, L. H. Pammel VIII, 262 



Cohesion, See Morrison XI, 191 



of Crystallization, Effect of Grinding on, N. Knight 



XVII, 131; XIX, 133 



Problems, Municipal, L. H. Pammel XIV, 115 



Supplies, Railroad, L. H. Pammel and E. D. Fogel.. XII, 151 

 Supply, Contaminated, J. B. Weems and J. C. Brown VIII, 91 



See Sioux City, Troops, Waters. 

 Surfaces, See Evaporation. 

 See Alcohol. 



Waterlily, White, of Clear Lake, H. S. Conard XXIV, 449 



of Iowa, H. S. Conard XXIII, 621 



of McGregor, H. S. Conard XXV, 235 



Waters, Analyses of, N. Knight.. VIII, 104 



Bacteriological Examinations of, L. H. Pammel, R. 



E. Buchanan and Edna L. King XI, 111 



Deep Well, Analyses of, J. B. Weems IX, 63 



Iowa, N. Knight XV, 109 



Ground, Features of, W. S. Hendrixson, XIV, 187; XVI, 135 

 Natural, of New York, N. Knight and V. C. Shippee. . XXIV, 485 

 Underground, Pollution of, with Sewage through Fis- 

 sures in Rocks, H. Albert XX, 7 



Waterworks for Small City, J. L. Tilton XII, 143 



See Laboratories. 

 Watson, E. B., Securing a Stand of Clover on the Southern 



Iowa Loess , XIV, 177 



The Action of Manure on a Certain Iowa Soil XVI 103 



Watt, Harry F., Growth and Pigment Production of Pseu- 



domonas janthina XII, 173 



Weaver, C. B., A Compai'ative Study of the Spores of 



North American Ferns Ill, 159 



An Anatomical Study of the Leaves of Some Species 



of the Genus Andropogon IV, 132 



Webster, R. L., A Study in Insect Parasitism XIX, 209 



Life History Notes on the Plum Curculio in Iowa 



(Conotrachelus nenuphar Herbst.) XX, 313 



Effect of Low Temperature on the Oyster-shell Scale 



LeindosapJies ulmi Linn XXI, 8 



Notes on Two Strawberry Slugs, Empria fragariac 



