IOWA ACADEMY OF SCIENCE 
143 
Whipple, Geo. C. The Value of Pure Water. Biological Studies by the 
pupils of William Thompson Sedgwick. 54-80. 
Winslow, C. E. A., and Lochridge, E. E. The toxic effect of certain acids 
upon typhoid and colon Bacilli in relation to the degree of dissociation. The 
Jour, of Infect. Diseases 3:547. 
Winslow, C. E. A., and Lochridge, E. E. The toxic effect of certain acids 
upon typhoid Bacilli in relation to the degree of their dissociation. Biological 
Studies by the pupils of William Thompson Sedgwick. 258-282. 
Winslow, C. E. A., and Phelps, E. B. Investigations on the purification of 
Boston Sewage. Dept. Int. U. S. Geol. Survey. Water Supply and Irriga- 
tion Papers. 185: 1-163. 20 F. 
Winslow, C. E. A., and Phelps, Earle B. The Chemical and Bacterial com- 
position of the Sewage discharged into Boston Harbor from the South Metro- 
politan District with special reference to Diurnal and Seasonal variations. 
The Jour, of Infect. Diseases. Suppl. 1. 1905. 175-208. May. 
Figure I. is a cut on the Northern Pacific Railroad, near the Cedar River. A 
little rivulet runs along side of the road bed, but no washing of soil occurs, al- 
though the rainfall Is over 100 inches a year. 
