Vol. XX OCTOBER 15, 1920 No. 2 



JOURNAL OF 



AGRICULTURAL 



RESEARCH 



CONTENTS 



Page 



Investigations of the Germicidal Value of Some of the 



Chlorin Disinfectants -------85 



F. W. TILLEY 



( Contribution bom Bureau of Animal Industry) 



A New Avocado Weevil from the Canal Zone - - - 111 

 H. F. DLETZ and H. S. BARBER 



(Contribution from Bureau of Entomology) 



Studies in Mustard Seeds and Substitutes: I. Chinese 

 Colza (Brassica campestris chinoleif era Viehoever) - 117 



ARNO VIEHOEVER, JOSEPH F. CLEVENGER, and 

 CLARE OLIN EWING 



(Contribution from Bureau of Chemistry ) 



Study of Some Poultry Feed Mixtures with Reference to 



Their Potential Acidity and Their Potential Alkalinity - 141 

 B. F. KAUPP and J. E. IVEY 



(Contribution from North Carolina Agricultural Experiment Station) 



The Influence of Cold in Stimulating the Growth of 

 Plants ^ - 151 



FREDERICK V. COVILLE 

 (Contribution from Bureau of Plant Industry) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF 



LAND-GRANT COLLEGES 



WASHINGTON, D. C. 



WAfHIHOTON t GOVERNMENT PRINTING. OFFICE t Itl* 



