Vol. IV AUGUSX, 1915 No. 5 



JOURNAL OP 



AGRICULTURAL 



RESEARCH 



CONTENTS 



Page 



Tensile Strength and Elasticity of Wool . . . .379 



ROBERT F. MILLER and WILLIAM D. TALLMAN 



Influence of Hybridization and Cross-Pollination on Water 

 Requirement of Plants 391 



LYMAN J. BRIGGS and H. L. SHANTZ 



Further Studies of the Embryology of Toxoptera Graminum . 403 



W. J. PHILLIPS 



Prickly-Pears as a Feed for Dairy Cows .... 405 



T. E. WOODWARD, W. F, TURNER, and DAVID GRIFFITHS 



A Nasturtium Wilt Caused by Bacterium Solanacearum . 451 



MARY K. BRYAN 



Phosphorus Metabolism of Lambs Fed a Ration of Alfalfa 



Hay, Corn, and Linseed Meal . . , . . . 459 



E. L. ROSS, M. H. KEITH, and H. S. GRINDLEY 



A Bacterial Disease of Lettuce . . . . . . 475 



NELLIE A. BROWN 



DEPARTMENT OF AGRICULTURE 



WASHINGTON. D.C. 



WASHINQTON : GOVERNMENT PRINTINQ OFFICE I 191B 



