The Avoidable Loss of Life, J. Howard Beard, M.D 64 



The Composition and Origin of Monk's Mound, 



A. R. Crook 82 



Papers on Agriculture 



The First Generation Cross Between Two Strains of 

 Corn Bred for High or Low Ear, A. M. Brunson 87 



Incomes of Dairy Farms, F. A. Pearson 101 



The Influence of the Amount of Ration and the Addi- 

 tion of a Nitrogenous Concentrate upon the Effici- 

 ency of Rations for Fattening Purposes, Sleeter 

 Bull 105 



A Study of the Relative Reliability of Official Tests 

 of Dairy Cows, W. W. Yapp 116 



The Influence of Utensils on the Germ Content of 

 Milk 119 



Papers on Botany 



An Ecological Survey of the Vegetation of the Illinois 

 Prairies, a Preliminary Report, Homer C. Sampson 123 



Some Interesting Mushrooms of Champaign County, 

 W. B. McDougall 125 



Peculiar Plant Distribution, H. S. Pepoon 128 



Cytological Phenomena Connected with Spermato- 

 genesis in Liverworts and Mosses, William L. 

 Woodburn 138 



Two Leaf-fungi of Cyclamen. William Trelease 143 



Papers on Physics, Chemistry and Engineering 



Determination of Atomic Weights of the Rare Earth 

 Elements, B. S. Hopkins 149 



A New Law Relating Ionization Pressure and Current 

 in the Corona of Constant Potentials, Earle E. 

 Warner 151 



The Supposed Effect of the Shape of the Container on 

 the Volume of a Gas, Abstract, W. A. Noyes and 

 L. C. Johnson 152 



Magnetic Permeabilities of 50,000, Trygve D. Yensen 152 



