EXPERIMENT STATION RECORD. 



Editor: E. W. ALLEN, Ph. D., Assistant Director. 

 Assistant Editor: H. L. Knight. 



EDITORIAL DEPARTMENTS. 



Agricultural Chemistry and Agrotechny — L. W. Fetzer, Ph. D. 

 Meteorology, Soils, and Fertilizers — W. H. Beal. 



Agricultural Botany, Bacteriology, Vegetable Pathology j^y' -g' j^^^^^'^' 



T^- IJ /-. fJ- I- SCHULTE. 



FieldCropsjj Q j^^^^^j^ 



Horticulture and Forestry— E. J. Glasson. 



Foods and Human Nutrition — C. F. Langworthy, Ph. D. 



Zootechny, Dairying, and Dairy Farming — E. W. Morse. 



Economic Zoology, Entomology, and Veterinary Medicine — W. A. Hooker. 



Rural Engineering . 



Rural Economics— J. B. Morman. 

 Agricultural Education — D. J. Crosby. 



CONTENTS OF VOL. XXII, NO. 7. 



Editorial notes: ^^S^- 



Julius Kiihn, professor of agriculture 601 



A new theory of bacterial activity in the soil 605 



Recent work in agricultural science 608 



Notes 695 



SUBJECT LIST OF ABSTRACTS. 



AGRICULTURAL CHEMISTRY — AGROTECHNY. 



Physical-chemical methods as applied to physiology, Asher 608 



Progress in fat and oil chemistry for 1908, Ulzer and Pastrovich 608 



Linseed oil and other seed oils, Ennis 608 



Meltingand solidification points of acid mixtures, Carlinfantiand Levi-Malvano. 608 



The ferments and their action, Oppenheimer 608 



Retardation of rennet action, Hedin 608 



The coloring matter of the tomato, \Mnstatter and Escher 609 



Composition of gas from cottonwood trees, Bushong 609 



Bacterial action the cause of the corrosion of steel, Gaines 609 



The decomposition of potassium nitrate, Franzen and Lohmann 609 



Determination of small quantities of nitrogen, Zeller 609 



Nitrogen determination in soil extracts, Densch 609 



The determination of colloids in clays, Endell 610 



Determining phosphoric acid , Guerry and Toussaint 610 



The determination of iron and alumina in phosphate rock, Dumas 610 



The determination of iron and alumina in inorganic plant constituents. Hare. . 610 



Two volumetric methods for determining calcium and magnesium, Schenke. . . 610 



Volumetric determination of small amounts of arsenic, Andrews and Farr 611 



Aids to the analysis of food and drugs, Moor and Partridge 611 



A source of error in the examination of foods for salicylic acid, Sherman 611 



Detection of formaldehyde in chopped meat, Bremer and Beythien 611 



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