or Sulphate of Iron, as a Mamirr. 5"; 



and oia pasture, and is equally favourable to the productio-,i 

 of corn ; the ground, whetlicr grass or arable, beu^g ot a 



cold nature. , i . „ 



3 It IS not mixed with llnic, or any other substance. 

 6 The dust is likewise bought bv the higglers, and earned 

 to -reat distances. The nearer farmers likewise send for 

 kdust in .ag,ons, particularly Mr. Anstie, o DunstaWe 

 Houghton, and Mr. Smith, oi Sundon, who hold tins ma- 

 nure in great esteem. 



1 ours, &c. 



Tingruh. j ^^_ WiLLAUME. 



Aug. 19, iSoi. 



Dr Pearson's Experhnents, Olservaiions, ami Remarks, 

 on the Substance calhd Salt of Peat, or Dust. 

 1. It is a blackish gray, coarse, and rather heavy pow- 

 der. Has no smell ; tastes strongly styptic ; readily dis- 

 solves in the mouth 5 did not deliquesce on exposure to 



1 1 If* 3.1 r 



o Dissolves in four times its weight of water of the tem- 

 perature of sixty degrees of Fahrenlicit, and m twice its 

 weicrht of boilincr hot water, giving a pale green co oured 

 sohuion, with a^rlthng sediment, which is uisoluble nx 



muriatic acid. ,.,,■•, • . c 



3 To the solution (2) I added a httle liquid prnssiate ot 

 ve^retable alkali in a perfectly neutral .late, which occa- 

 sio'ned immediately a most abundant precipitation of pnis- 

 siatc of iron ; and this test was added gradually, till uo 

 further precipitation took place. , ^ . , , , , 



4 Into the decanted and liUratcu fluid (3) was poured 

 liquid caustic volatile alkali, but without inducing any 



chancre. , ,. . , , .„ 



3 ^Into the same fluid (3) was poured liquid carbona e 



of vegetable alkali, which produced a scarcely perceivable 



cloudy appearance. . 



C 'Into the solution (3) was dropped the aqueous solution 



of muriate of baryt, which occasioned immediately a milky 



appearance. ,. . , , , 



7. To the solution (3) I added the oxalic acid, and tur- 



bidness ensued. n 1 ^1 .n ,,f 



8 A little of the powdery substance, called the salt ot 



peat, with concentrated sulphuric acid, produced no emis- 



feion of fumes, nor smell. . .■♦„k, 



9. The solution (2) with muriate ol baryt, immediately 



crew thick and white ^s ciTMin. 



^ 10 The solution (2) uuh carbonate ol potash, deposited 

 1) .} ii very 



