July I, 1920 



Transmission of Mosaic Disease of Irish Potatoes 325 



eu a S ?■§ 



000000 5;0 o 00 



u 9. 



u o p _ 



3d 

 §3 "0-2 



O O O O O O r^ •^'O -^ ' 





<=, 



H2 





B-a 



H 3 



a Si! 3>-|.o 



|a-o"-- 



Hi 





O ^■C ^f"' O-M TtO '^ ' 



•^0^<2 0'^J-0000 



OOOO^'C^OOOO 



Tto '^O O O '^O o^ o 



OOOONC^OOOO 



SiNOOOCNOO" 



eg 



a >- 



P8 





S'-S ■I 



H C. >- ti >- • 

 B a id 9 '^ 1 



>,cpwO£c 



£ U U U U I 



•5:5 0-2 otj 



^ — -C — IJ— rt nl nj cs I 



OQ> CJ -WOOOO 



' oH cu o*!: cH ocj 



: 3 .52 Si 3 .g 



) H ^ O P3 « 



