34* THE BEE, OR March %i 



Farther Particulars conccrnnig the ufe of Gypfum as ci 

 manure in North America. 



Copy of a Letter from Mr. H. Wynkoop, ofVerden Hoff, 

 Bucks County y PenJ'yhumnia, 13th ^'"'S."ft *7^7» ^°' 

 the Prefident of the ylgriculture Society at Phila- 

 delphia, 



" Sir, 

 " Convinced of tlie utility of the plafier of Paris as a gvafs 

 mauui'c, I commtinicate to you, for the information of the 

 fbciety, an experiment which I lately made. In the month 

 of March laft, as foon as tlie fnow was olV the ground, and 

 fo fettled as to bear vvalkiiiiT upon tlie furface, I fpread 

 eight bufliels of the plaller of Paris upon two and a half 

 acres of wheat ftubble grounj, whicli had beet> lown the 

 fprin^'; before (in common with the rell of the field) wJi.li a- 

 bout tViTo pounds of red clover feed for pafture ; this fpot 

 -■fielded, about the middle of June, five tons of hay. A 

 fmuU piece of ground widiln tlie inclolure, and of /imilar 

 quality, having- been left unfpread with the plafter, afforded 

 an opportunity of didinguilhing the effefts of plailer of Pa- 

 ris as a manure ; for, from the produce of the latter, there 

 vras good reafon to judge that my piece of clover, without 

 the alhilance of the plalter, might have yielded one and a 

 half tons of hay ; fo that the eight bufhels of the pulverized' 

 ftone muil have occaiiontd an increafe of three and a half 

 tons of hay upon two and a half acres of ground ; in addi- 

 tion to which, it is now covered, to appearance, with be- 

 tween tvi-o and three tons fit for the fcythe. This foil has' 

 been in courfe of tillage about fifty years, and never had 

 any dung or manure upon it, but yet was what nught be 

 called good wheat land. As the efFefts of the plaller were 

 thus powerful upon fuch kind of ground, there is good rea- 

 fon to conclude they would be much greater upon a foil pre- 

 vioufiy manured. 



With due refpe£t, I am, &c. 



Henh.y Wynhqop.- 

 To the Prefident r,f the Agricuhural 

 Society in Ihilailelphia. 



