EXPERIMENT STATION RECORD. 



Editor: K. \V. AM ION, I'n. D.. Axsislaiil Diicrlor. 



EniTOKIAl- DKPARTMENT.S. 



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



Afiricultiiral Botany and Vejjetahle Pathology — W. II. Evans, Ph. D. 



Field Crops — J. I. Stiiii.TE. 



Ilorticnltnre and Forestry — ('. B. Smith. 



Zootei'hny and Unman N'ntrition — ('. F. Langworthy, Ph. I>. 



Agrotechny, Dairy Farniinj;, and Dairying — H. W. Lawson. 



Agrienltural Chemistry — W. M. Beai,. C. F. Langwoktiiy, and II. AV. Lawson. 



Economic Zoology. lOntomology, and Veterinary Medic-in(> — E. Y. Wilcox, I'h. D. 



Rnr.-U Engineering — B. I*. Fleming. 



Knr.il Economics — J. B. Morman. 



Agricultnral Edncatiou — D. J. Crosby. 



CONTENTS OF VOL. XVIII. NO. 6. 



Ef.'itorial notes : Page. 



Some problems in agricultnral instruction 501 



The training of teachers for agricultural histruction . 503 



Department of nutrition in the Carnegie Institution 505 



Problems of Animal Nutrition, Henry Prentiss Armsby, Ph. I) 508 



Recent work in agricultural science 522 



Notes 597 



SUB.TEC'r LIST OF ABSTRA("rS. 



A<iRU'ULTURAL CHEMISTRY. 



Quantitative volatilization of j)hosphoric acid, Jannasch <-iiid lleimann 522 



Woy method for determination of pli()si)horic acid, Van Kampcii 522 



Rendering combinations of phosi)horic and silicic acids soluble, Newton — 522 



Availal)ility of phosphoric acid of the soil, Fraps 522 



Determination of nitric acid in soils, Gutzeit 522 



Determination of humus acids in soils by Tacke method. Van Daalen 522 



Determination of small quantities of iron, Marriott and Wolf 528 



Determining the crude fiber content of cocoa, Ludwig 528 



Estimation of crude til)er in cocoa goods. Matthes and Miiller 52;; 



Determining the digestible protein in feeding stuffs, Stutzer 523 



Estimating pepsin-soluble constituents of feeding stuffs, Stutzer et al — 528 



P^stimating cellulose, lignin, and kutin in crude fiber, Kiinig 524 



^^Dptical rotation of gliadin in certain organic solvents. Mathewson 524 



T— Quantitative estimation of albumen by precipitin reaction, Schulz 524 



■j—fermentation changes in Muscovado sugars. Watts and Tempauy 524 



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