179'' LITERACY INTELLIGENCER. 3OI 



fields without plafter; thefe were unproduftive, and not 

 worth mowing. 



" In April 1 788, 1 covered a fmall piece of grafs ground 

 upwards of two inches thick, with farm-yard manure, 

 in the fame worn out field. I fowed plafter to contrail 

 it with the dung. I mowed the dunged and plaftered 

 land twice laft year, and once this ; in every crop, the 

 plafter has produced the moft. You will remember, 

 in all your experiments with closer, you fbould mix 

 about one third of timothy-grafs feed ; it is of great ad- 

 vantage in ferving as a fupport for the clover, as it 

 prevents it from falling ; it very much facilitates the 

 airing of the clover, and when aired, is a fuperior fod- 

 der. The plafter operates equally as well on the other 

 grafles as on clover. Its efffect is faid to be good, if 

 fown in the fpring, on wheat ; but this J cannot fay 

 from experience. On Indian corn, I know its opera- 

 tion to be great. We ufe it at the rate of a table 

 fpoonful for a hill, put on immediately after drefsing. 

 From fome accurate experiments laft year, and re- 

 ported to our Agriculture Society, it appears, that 

 nine bufhels of additional corn per acre was produced 

 by this much of plafter. As the ufe of this cheap 

 and extraordinary manure has now become very 

 general in this State, and many accurate and judicious 

 farmers are now making experiments therewith, I doubt 

 not but its ufes at the clofe of the feafon will be better 

 known, and further extended ; when I Ihall be happy 

 to make a communication thereof to you. 



Experiments "iSc. on the Piq/ler of Paris, made in the 

 Province of Pennfylvania ; — Communicated hy a Gen- 

 tle jnan in ^tebec, Member of the Agricultural Society, 



Copy of a Letter from Robert Morris to feffe Lawrence. 



" After the converfation which pafled between thee 

 and me, on the fubjeft of plafter of Paris, I conceived 

 it might not be improper to give thee an account of the 

 i'vveral trials which I have made with it as a manure 



