A Letter on the XJje of Plaljler of Paris. 50 



this cafe, it is abfolutely neceflary to apply it immediately to the 

 corn, as it appears above ground, and that in a confiderablc 

 quantity — I have put it on grafs ground every month in the 

 year, except during the feverity of winter, and have found, that 

 early in April is preferable to any other feafon ; at which time, 

 the grafs juft; fliooting, the fmall particles of the Gypfum arc 

 retained about the roots, and prevented from wafhing away. 

 On ftiff clay foils, it will produce an increafe of vegetation, but 

 not fufficient to pay the expence of the manure. 



