Vol. XXII OCTOBER 22, 1921 No. ^ 



JOURNAL OP 



AGRICULTURAL 

 RESEARCH 



coN'rE>N'rs 



Page 



Flora of Corn Meal --------179 



CHARLES THOM and EDWIN LeFEVRE 



( Contribution from Bureau of Chemistry ) 



Hopkins Host-Selection Principle as Related to Certain 

 Cerambycid Beetles ------- 189 



F. C. CRAIGHEAD 



( Contribution from Bureau of Entomology) 



Notes on the Organic Acids of Pyrus coronaria, Rhus 

 glabra, and Acer saccharum - - - - - - 221 



CHARLES E. SANDO and H. H. BARTLETT 



( Contribution from Bureau of Plant Industry and University of Michigan ) 



Fertility in Shropshire Sheep - - - - - -231 



ELMER ROBERTS 



( Contribution from Illinois Agricultural Experiment Station ) 



PUBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF 



LAND-GRANT COLLEGES 



^W:A.SHlNaTON, D. c. 



