J&oiMttionof€aff& 9 



{Magnitudes and figures of the parti- 

 cles, which the fire, by breaking 

 them, or forcibly rubbing them one 

 againft the other, or alfo againft the 

 Corpufcles of the additament, may 

 be prefumed to give them j as if, for 

 example, fince we find the larger and 

 beft formed Gryftals of Nitre to be 

 of a prifmatical fhape with fix fides, 

 we (hould fuppofe the corpufcles of 

 Nitre to be little prifms, whofe angles 

 and ends are too obtufe or blunt to 

 make vigorous and deep impreffions 

 on the tongue ; and yet, if thefe lit- 

 tle prifms be by a violent heat fjplit^ 

 or other wife broken, or forcibly 

 made as it were to grind one another, 

 they may come to have parts fo much 

 fmaller than before, and endowed 

 with fuch (harp fides and angles, that, 

 being diflblved and agitated by the 

 fpittle that ufually moiftens the 

 tongue , their fmalnefs may give 

 them great accefs to the pores of that 

 organ, and the (harpnefs of their fides 

 and points may fit them to ftab and 

 cut, and perhaps (ear the nervous 



and 



