322 OBSERVATIONS ON THE DISEASES, &c. 



burnt bones ; put it into a tin box, with holes in the top, and 

 fhake the powder on the furface of the plafter, till the whole 

 is covered over with it, letting it remain for half an hour, to 

 abforb the moifture ; then apply more powder, rubbing it on 

 gently with the hand, and repeating the application of the 

 powder till the whole plafter becomes a dry fmooth furface, 



AH trees cut down near the ground fhould have the furface 

 made-quite fmooth, rounding it offin a fmall degree, as before 

 mentioned ; and the dry powder directed to be ufed afterwards 

 fhould have an equal quantity of powder of alabafter mixed 

 with it, in order the better to refift the dripping of trees and 

 heavy rains. 



If any of the Compofition be left for a future occafion, it 

 fhould be kept in a tub, or other vefTel, and urine of any kind 

 poured on it, fo as to cover the furface ; otherwife the atmo- 

 fphere will greatly hurt the efficacy of the application. 



Where lime-rubbifh of old buildings cannot be eafily got, 

 take pounded chalk, or common lime, after having been 

 flaked a month at leaf!:. 



As the growth of the tree will gradually affect: the plafter, 

 by raifmg up its edges next the bark, care fhould be taken, 

 where that happens, to rub it over with the finger when 

 occafion may require (which is beft done when moiftened by 

 rain), that the plafter may be kept whole, to prevent the air 

 and wet from penetrating into the wound. 



WILLIAM FORSYTH. 



William Forfyth, of Kenfington, in the county of Mid- 

 dlefex, Gardener, maketh oath, and faith, that the 

 foregoing is a true account of the method of making 

 and ufing the Compofition discovered by him for 



curing 



