[ ^^^ ] 



quantity of water contained in ilb. of the foil ; note this lofs, 

 and call it the ivatry fupplement^^W, fuppofe it in this cafe loo 

 grains. 



4°. Take another pound of the above mafs freed from ftones, 

 deducing the ftony and watry fupplements, that is lib — S — VV, 

 or in the above cafe lib. — 20zs. 57-|-grs. for ftone, and — loogrs. 

 for water, confequently lib. — 2 ozs. I57y grs. reduce it to powder, 

 boil it in four times its weight of diftillcd water for half an 

 hour; when cool pour it off, firft into a coarfe linen filtre to 

 catch the fibrous particles of roots, and then through paper to 

 catch the finer clayey particles diffufed through it ; fet by the 

 clear water, add what remains on the filtre to the boiled mafs ; 

 if it be infipid, as I fuppofe it to be, then weigh the fibrous 

 matter, and call it the Jibrous fttpplement =¥ ; fuppofe it in the 

 example in hand to weigh 10 grs. 



5"^- Take two other pounds of the mafs freed from ftony 

 matter, No. II. fubftrading from them the weight of the 

 ftony, watry and fibrous fubftances already found, that is 

 2 lb. — 2S — 2W — 2F; pour twice their weight of warm diftilled 

 water on them and let them ftand twenty-four hours or longer, 

 that is until the water has acquired a colour, then pour it off and 

 add more water as long as it changes colour, afterwards filtre the 

 coloured water and evaporate it to a pint or half a pint, fet it 

 in a cool place for three days, then take out the faline matter, if 

 any be found, and fet it by. 



C°' Examine 



