Vol. Page 



660 INDEX 



Nuts Used as Food, Chemical Composition of. J. B. 



Weems and Alice W. Hess 



Nutting, Cleveland C, Nematocysts 



Some of the Causes and Results of Polygamy among 



the Pinnepedia 



Systematic Zoology in the Colleges 



President's Address, 1891, What We Have Been Doing 

 Chairman, Report of Committee on State Fauna.... 



I, ///, 39 ; 



• Significance of the Concealed Crests of Fly-catchers 

 The Vascular Supply of the Teeth of the Domestic 



Cat 



The Homology of the "Inca" Bone 



Origin and Significance of Sex 



Do The Lower Animals Reason? 



The Color of Deep-sea Animals 



The New School of Animal Psychology 



The Progress of Zoology in Iowa During the Last 



Twenty-five Years 



Greetings from Davenport Academy of Sciences 



Nutting, Cleveland C, Charter Member, L. H. Pammel . . 



O 



Oak, Hybrid, B. Shimek 



Poison, Mites Affecting, H. E. Ewing XXIV, 



Oaks, Cynipids and Cynipidous Galls on, C. P. Gillette. 



Germination and Juvenile Forms of, L. H. Pammsl 



and C. M. King XXIV, 367 



Oats, See Smut. 



O'Brien County, See Birds. 



Ocheyedan Mound, Osceola County, G. F. Kay XXIV, 101 



Odonata of Iowa, Lloyd Wells XXIV, 327 



Oehler, A. J., Certain Elastic Properties of Phosphor- 

 bronze Wires XXIII, 213 



See Sieg and Oehler. 



Oelwein, Drift Section at, G. E. Finch IV, 54 



Oenotheras, Early Records of, R. R. Gates XVII, S5 



Oil, Natural Gas and, in Iowa, C. R. Keyes I, III, 15 



See Pits, Cherry. 



Oils, Kerosene, Study of, G. W. Stewart XVII, 181 



Oils, See Cotton Seed. 



Okanogan Valley, Washington, Terraces of, C. R. Keyes XXIV, 47 



Okoboji, Lake, Levels and Tempei*atures of, J. L. Tilton 



XXIII, 91; XXIV. 33 



See Entomostraca. 

 Oleson, 0. M., and Somes, M. P., A Flora of Webster Coun- 

 ty XIII, 25 



Omaha, See Dust. 



Oneota "Valley, See Pottery. 



