30 Experiments and Ohfervaiions' 



firfl of April to late in the autumn 1791, it has difplayed the 

 fame beautiful appearance through the whole of this dry fummer. 



No. 6. 

 On three acres of ftiff clay ground, laying very flat (part of 

 a field that has been mown two years) dreffed with fix bufliels 

 of Gypfum to the acre. The appearance of the grafs during 

 the fummer 1 790, of a deeper green than that of the reft of the 

 field; no great difference however in the firft cutting of grafs ; 

 the after-grafs evidently more luxiu'iant than the reft of the field, 

 but having been fed down, cannot eftimate th6 difference. 

 This fummer, 1791, being remarkably dry, the above three 

 acres were very fuperior to the reft of the field. The diffe- 

 rence being, as I judged from counting the hay-cocks, as 7 is to 

 4 ; the beft, however, not yielding more than one and one third 

 ox-loads to the acre. 



No. 7. On the fame field. 

 [Auguft, 1790.] Spread on a rood of the field laft mention- 

 ed, one bufhell of pulverized limeftone. This fummer, 1791, 

 the effefts of it were difcernable to an inch, both in the ver- 

 dure and luxuriancy of the grafs : the difference between that 

 and the parts adjoining were in its favor (as I judged by count- 

 ing the cocks) as 7 to 4 ; from whence I infer, that on clay 

 ground, eight buftiels of pulverized limeftone, is at leaft equal 

 to fix of Gypfum. 



