* 
70 On Plaister of Paris. ’ 
field; limed in the spring of 1790, and well dunged 
in the summer of 1793 ; ‘in tillage at least sixty years; 
soil a light and stony loam, sown with clover seed in 
March, 1794. 
Result. 1796. The improvement so great, that after 
pasturing it down early in the spring, the appearance 
is in favour of mowing a good crop of grass, which I 
intend to do. 
Process. May 5th, 1795. Sowed thirty-three bushels 
of plaister upon about eighteen acres of the far field, 
limed in the year 1793, and sown with clover upon oats 
in the spring of 1794; soil a light isinglass loam, and 
excessively poor before liming ; in tillage at least seven- 
ty years. 
Result. 1796. The improvement equal to any of the 
soils of equal fertility. 
FE OEE BEET 
eT 
Process. 1 have tried many other experiments with 
plaister, upon several kinds of grain, flax, and garden 
vegetables, but with such various and trifling success, 
as to discourage me from a farther continuation of them. 
——— 
2 
icf I have unfortunately mislaid a letter from Mr. 
Heckewelder, of Bethlehem, giving an account of the 
use of plaister on the Brethren’s farms there, by Mr. 
Beidel and another, their superintendants. It is confir- 
= 
