Vol. VI SEPTEMBER IS, 1916 No. 25 



?■ 



JOURNAL OF 



AGRICULTURAL 

 RESEARCH 



CONTENTS 



Page 



Studies on the Physiology of Reproduction in the Domestic 



Fowl.— XV. Dwarf Eggs 977 



RAYMOND PEARL and MAYNIE R. CURTIS 



a-Crotonic Acid, a Soil Constituent - 1043 



E. H. WALTERS and LOUIS E. WISE 



DEPARTMENT OF AGRICULTURE 



WAS HINGTON , D.C. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1919 



