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



PLATE VIII 



Nil 05 Zn IZn -IZn M Zn '2 FeS, 'S FeS, 



" G." Effects of Blende and Iron Pyrites upon Oats. See p, 390. 



' H." Effects of various treatments of affected soil. See p. 391, Table XVII. 



