PESTS OF TIIK TTOI' CUOP. 



145 



m 







a/ 



^z;:^ 



rA 



.i^p .-''^^-^ 



•'' '^ -J 



^a )l:i« 





/m 



10 



I'lG. 75. AN liELWOKM DISEASE OF HOPS. 



[For explanation, see Page 147.] 



