the Stveai/b Stone Paper. iGt 



Hrft fheet of paper. The comprefled mafs was then laid 

 dver upon another board fprinkled with fand, and left to dry, 

 after taking the fheet of paper from its other fide, Squares 

 made in this manner dry without cracking; but as they be- 

 come warped, it is neceflary afterwards to flatten them, by 

 putting them, with boards between, under a fcrew-prefs 7 and 

 letting them ftand for fome time. 



Exp. I. I mixed an ounce and a half of the dry pulp 

 from the mill with two ounces of common glue, and, having 

 added red bole and ochre, of each two ounces, obtained a. 

 fmooth plate. 



II. To two ounces of pulp I added four ounces of red 

 bole pulverifed, and half an ounce of chalk, with an ounce 

 and a half of glue. The plate thus produced was full of 

 wrinkles and chinks, but tolerably hard. 



III. An ounce and a half of pulp, with four ounces of 

 bole, and two of fulphat of iron, produced a plate equally 

 hard, but uneven. 



IV. An ounce of pulp procured from old paper and book- 

 binder's (havings mixed, with half an ounce of glue, an 

 ounce of powdered chalk, two of bole, and an ounce of 

 linfeed oil, produced two thin plates fmooth and hard. 



V. Two ounces of pulp from the mill, with half an ounce 

 of glue, fix ounces of red bole and two of chalk, to which 

 were added two ounces of fulphat of iron, and the fame quan- 

 tity of linfeed oil, afforded plates that were fmooth, but not 

 flrong. 



VI. An ounce and a half of pulp, with an ounce of gluey 

 and four ounces of white bole, produced a plate fmooth.,' 

 beautiful, and hard. 



VII. An ounce and a half of pulp, mixed with twaounces 

 of ghie, two ounces of white bole, and as much chalk, yielded 

 a fmooth plate as hard as bone. 



VIII. An ounce of pulp, one ounce of glue, threfe ounce* 

 of white bole, and an ounce of linfeed oil, produced a plat* 

 fafficlendy perfect and elaftic. 



V^l, III, M jfX.A 



