.G70 INDEX 



Vol. I'agk 

 Kobb, Luella, See Pammel and Robb. 



Rock, Glaciated, near Linn and Quarry, W. H. Norton.... XVIII, 79 

 See Analyses. 



Rock Mortars, Aboriginal, H. L. Bruner I, //. 64 



Rocks, Carbonic, See Carbonic Rocks. 

 Crystalline, See Missouri. 

 Effect of Characteristics of, on Erosion, J. E. Todd. . XIV, 267 



Our Pre-Cambrian, C. R. Keyes XXI, 195 



Pre-Cambrian, Stratigraphy of, C. R. Keyes XXIV, 53 



Striation of, by River Ice, J. E. Todd 1,11. 19 



Rockwood, Elbert W., The Uric Acid Ferments XV, 99 



The Digestibility of Bleached Flour XVII, 125 



Some Auxoamylases XXIII, 37 



The Action of the Amino Group on Amylolitic En- 

 zymes XXIV, 551 



Rocky Mountain Plants, See Diseases. 

 Rocky Mountains, See Mississippi Valley. 



Rodents, Iowa, D. Stoner XXIV, 35'5 



Rogers, Walter E., Notes on Mclilotus alha. White Sweet 



Clover XXIV, 415 



Rohret, Marguerite B., The Morphology of the Thallus 



and Cupules of Blasia pusilla XXIV, 429 



Rolfs, Mary C, Notes on the Pollination of Some 



Liliaces and a Few Other Plants I. IV. 9S 



Ross, Luther Sherman, Preliminary Notes on the Iowa 



Entomostraca Ill, 170 



Some Manitoba Cladocera, with Description of One 



New Species IV, 154 



A New Species of Daphnia and Brief Notes on Other 



Cladocera of Iowa IV, 162 



The Illinois Biological Station IV, 167 



A Simple Incubator VI, 116 



Apparatus for Plating out Petri Dishes in the Field. . XII, 7 



An Observation on the Number of Bacteria in Des 



Moines School Buildings XIII. 21 



Food of Subterranean Crustacea XIII, 273 



A Case of the Isolation of Diphtheria Bacilli from a 



Post Mortem XV, 97 



Historical Sketch of Early Health Regulations in Iowa XVII, 229 



Bacterial Content of Desiccated Egg XXI. 33 



An Incubator Opening to the Outside of the Build- 

 ing XXI, 51 



An Observation of Longitudinal Division of Hydra.. XXI, 349 

 Presidential Address, 1918, Does the History of 



Science Have a Place in the College Curriculum?. . . XXV, 33 

 See Pammel, Summers and Ross. 

 Rowley, R. R., See Keyes and Rowley. 

 Rueda, Grace Roodde, The Biology of the Bacillus Fio7a- 



ceus laurcntius or Pseudomonas Janthina XII, \2\ 



