( 901 ) 
difcover none in the Water that was boy! 'd enough 3 
from v/hence I concluded, that thofe Salt Particles which 
give the unboyrd Water an unpleafant Tafte, might very 
probably be thofe which we call the Volatile Sslrs, which 
by a great deal of Boyling, are, it I may fo (peak, dif« 
lodged, or evaporated out of the Water. 
You were like wife pleas'd td ask my opinion, Sir, abo?a 
the Edge of Razors^ which being made of pure Steely the Con^ 
figuration of its parts (you fay J mnji needs be verj Jrrange ; 
fo that it is equally Jpojl'd with too great Heat or too great 
Cold 5 in either cafe it is unfit to Jhave with 5 and y on cannot ' 
guefs at the Reafons ofit^ &C. 
To this 1 anlvver. Sir, that I have feveral times confi- 
der'd the Edge of Ilazors ^ the more, becaufe I have had 
five Razors ior feveral years, which I ftt for my own ufe 
upon a Hone, and keep them (harp enough only there is 
one among them which I have not uf^d a long time, be- 
caufe it is hard and full oi Notches. 
This Pvazor I (how'd to a Fellow who goes about grind- 
ing them, and was formerly a RaCor maker, who reeling 
the edge, did believe he could cure it 5 adding, that he 
would grind it without Water, and thereby bring it to 
fuch a ricat, that it iliould be foftcr, and better Tern* 
perVi. 
Tho this Fvafor cuts pretty well, and I can ufe it in 
fhaving, yet it is fo full of Notches, and fome that 
are very large, that one would wonder how it can cut a 
Hair without caufingPain and Smart. 
To farisfie ray fcU further in this mat-xr, I order'd tlie 
aforefaid perfon to bring me five mw EngHfj Pvazors^that 
had never been ufed, and wherein he pretended I fhould 
not find one Notcli^ I view*d them with my Microfco|xs, 
and found abundance of fmall Notches in them, and 
feme pretiy large about the Point oi the Pvaz. rs 5 and in 
one of them clofe to the Edge 1 obfcrved a little liole that 
1 could fee thro, fo that if the Razois fad not been very 
F f ff f t 2 clean 5 
