Vol. X JULY 9, 1917 No. 2 



JOURNAL OP 

 AGRICULTURAI/ 



RE SEARC H 



CONXENXS 



Page 



A Study of the Rate of Passage of Food Residues Through 



the Steer and Its Influence on Digestion Coefficients - 55 

 P. V. EWING and F. H. SMITH 



A Further Contribution to the Study of Eriosoma pyricola, 



the Woolly Pear Aphis - - - _ - _ - 65 



A. C. BAKER and W. M. DAVIDSON 



Microorganisms and _Heat Production in Silage Fer- 

 mentation - - - - - -- - - 75 



O. W. HUNTER 



Isolation of Cyanuric Acid from Soil - - - - - 85 

 LOmS E. WISE and E. H. WALTERS 



Family Performance as a Basis for Selection in Sheep - 93 

 E. G. RITZMAN and C, B. DAVENPORT 



A Needle Blight of Douglas Fir 99 



JAMES R. WEIR 



PUBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



^WASMINGTON, D. C. 



WASHINQTON : QOVfRNWENT PHIHTINO OFFICE t l»n 



