JOURNAL OF AGRICULTURAL SCIENCE. Vol. IX. No. 4. 



PLATE VII 



t 

 Nil 



I 

 ■I Pb 



f 

 •2Pb 



t 

 •4Pb 



' E. " Showing effects of Galena upon roots of Tiifolium plants. See p. 389. 



' F." Showing immediate influence of Galena upon Trifolium. See p. 390. 



