General Index. 



323 



Objects xix 



Officers v, xx 



Oil analysis, Interpolation method 



in xxix 

 Oil fields in Illinois xxvii 

 Optical illusion, Interesting xxvll 

 Organization xix 



Origin of species in nature xxviil 

 Outten, Wm. B., Death of xxvii 

 Ova in mammalian ovary, Parth- 



enogenetic development of 



xxvii 

 Oviposition in Samia cecropia 275 



Parthenogenetic development of 

 the ova in mammalian ovary 

 xxvii 



Patrons vi 



Plants, from Mexico, Four new 17 



Poulton's theory of mimicry xxlx 



President, Address of xxxi 



Propeller, Air xxviii 



Publications xxii 



Report of Librarian xxxiv 



President xxxi 



Treasurer xxxiii 

 Robert, Edward S., Death of xxx 



Saint Louis, Glacial geology at 



xxvii 

 Samia cecropia. Observations on 



275 

 Schweitzer, Paul, Death of xxlx 

 Sexual selection in Cecropia motli 



275 

 Solutions, Electric experiments In 



study of xxx 

 Species in Nature, Origin of xxviil 



Temperature in United States, 



Annual xxviil 

 Treasurer, Report of xxxiii 

 Tubes, London xxviii 



United States, Annual rainfall and 

 temperature of xxviii 



Rainfall in United States, Annual van't Hoff, J. W., Death of xxvll 



xxviii 



Report of Curators xxxiv Yellowstone National Park, Geol- 



Entomological Section xxxiv ogy of xxvii 



