316 On Gypsum. 



" — - ■ - 



POSTSCRIPT. 



As this may probably be the last time I shall trouble 

 the society on the subject of the gypsum^ I take the oc- 

 casion to mention, that Judge JVashington informs me 

 of his having strewed the plaister with success on his 

 grass grounds, in other parts of the Mount Vernon farm, 

 than those on which General JVashington had failed. 

 These parts are high and mixed with gravel. Mr. 

 Lawrence Lewis, who holds part of the Mount Vernon 

 estate, has lately perceived a luxuriant produce of white 

 clover on corn hills on the low lands, which, had in the 

 general's time, shewn no signs of being benefitted by 

 the plaister put on by him, and which now operates, 

 though applied many years ago. It will be seen in a 

 note, in my collection of facts in 1797, that the general 

 informed me of his failures, in every mode taken by 

 him to use the g}^psum on his fields, especially on the 

 low lands. 



No plaister was sown in England or France, though it was 

 strewed in Germany, before its use was extensive, and its 

 efficacy proved, in America. We have thus made some re- 

 turn, for the agricultural information received from Europe. 



11. P. 



