244 INDEX. 



PAGE. 



Relation of physics to the other material sciences 21 



Report of Secretary 13 



Report of Treasurer „ IS 



Resolutions 17 



Rhizopods in Pella beds 120 



R.icker, Maurice, large red hydra , . 125 



University of Montana Biological Station 122 



Ruling engine, for making zone plates , 181 



Saint Louis formation 120 



Sanitary analyses of deep well water = . . , 63 



Science, earliest development of , . . 24 



Scudder, Frank, cited ,.. .. 80 



Selaginella rupestris 151 



Sewage, chemical composition of , , , 70 



Shimek, B. , forestry in Iowa 53 



Simple harmonic motions, model for compounding ....>. 37 



Sioux City water supply 90 



Sodium carbonate 85 



hyponitrite 82 , 83 



Steamboat Rock, plants of . 136 



Swallow, G. C „..,.. .. ..... 109 



Transverse vibrations , model illustrating , 34 



Udden , J . A . , Pleuroptyx in Iowa Coal Measures 121 



Rhizopods in the Pella beds. . , , 120 



University of Montana biological station c . . - 122 



Uprisings of shores of Black Sea 103 



Ustiloginse of Iowa 226 



Vascular cryptogams of Iowa. , . . 134 



Veblen, A. A., Hereditary transmission of finger patterns »., 44 



Improved laboratory apparatus ... 34 



Presidential address of , , . 21 



Waters of deep wells, analyses of „.. c ... o ..... . 63 



Water supply of Sioux City . , .......... 90 



Analyses of , 93, 100 



Weems , J . B. , chemical composition of sewage ..... 70 



Sanitary analyses of deep well waters „ 63 



Western Iowa, flora of 152 



Wocdsia Ilvensis , . , e ......... ^ , 148 



obtusa , . ..... 149 



scopulina -^_ ... .c, .......,,,... 149 



Zone plates, ruling engine for making, ,*»,., c = .,., 181 



