10 IOWA ACADEMY OF SCIENCE Vol. XXV, 1913 



Page 



A Consideration of Some Soil Acidity Methods 



R. E. Stephenson 



Color Effect of the Furane Nucleus 



Nellie M. Naylor and Raemer R. Renshaw 



The Determination of Surface Tension by the Drop Weight 



Method W. D. Harkins and F. E. Brown 



The Laboratory Preparation of Nickel Carbonyl 



J. S. Coye and R. R. Renshaw 



Studies of the Gastric Residuum III. The Inorganic Con- 

 stituents of a Composite Sample of Gastric Residuum Ob- 

 tained from 70 Apparently Normal Men, and their Com- 

 parison with the Inorganic Constituents of a Composite 



Saliva Sample Obtained from the Same Individuals 



Chester C. Fowler and John H. Buchanan 



Studies of the Gastric Residuum IV. Amino Acid Nitrogen 



Ruth B. Cessna and Chester C. Fowler 



A Study of Over 70 Twenty-four Hour Urine Samples Obtained 



from Apparently Normal Women 



Zelma Zentriiire and Chester C. Fowler 



The Relation of the Composition of Iron and Mild Steel to 



Corrosion J- S. Coye 



Methods for the Determination of Total Nitrogen in Soils 



Containing Rather Large Amounts of Nitrates 



R. S. Snyder 



The Number and Action of Molds in the Soil 



P. E. Brown and W. V. Halyersen 



The Production of Acid Phosphate by Composting Sulfur and 



Rock Phosphate P. E. Brown and B. J. Firkins 



The Growth of Legumes and the Nitrogen Problem 



P. E. Brown and J. H. Stallings 



The Nature of Soil Acidity 



R. S. Potter and R. E. Stephenson 



The Organic Phosphorus of Soil. .R. S. Potter and R. S. Snyder 

 A Study of the Comparative Availability of Different Forma of 



Phosphorus in Nutrient Solutions Ross L. Bancroft 



The Oils in Cherry Pits 



Nicholas Knight and Harold L. Maxwell 



Some Problems of Water Supply for Troops 4.51 



Jack J. Hinman, Jr 457 



A Study of Certain Green Manure Crops in Making Rock Phos- 

 phate Available in Soils 



Ross L. Bancroft and B. J. Firkins 477 



The Composition and Digestibility of ^udan Grass Hay 



W. G. Gaessler and A. C. McCandlish 479 



The Occurrence and Possible Toxicity of Molds in Corn Silage 



. Alvin R. Lamb 491 



Deterioration of Concrete Silos Due to the Corrosive Influ- 

 ence of Silage Acids S. B. Kuzirian 



Some Observations on Kendall's Method for the Determination 



of Iodine in Thyrod Preparations S. B. Kuzirian 495 



