BUL. 26, DIV. VEG. PHYS. & PATH., U. S. DEPT. AGRICULTURE. 



PLATE L 



ERWIN F. SMITH, F. A. WALPOLE 

 AND JOHN L. RIOGWAY. 



A-HOfUl & CO.I-rrHOCAUSTlC.BAi.'nMOKr 



PSEUDOMONAS HYACINTHI (WAKKER) ERW. SMITH. 



