322 Mr. mudge on the ConJlruElion 
Dr. smith’s procefs, I made a fet of tools in the manner 
before defcribed, except that I was obliged to make fome 
fubfequent alteration in the poliflier which I ill all pre- 
fen tly defcribe. Having given a good fpherical figure 
to the brafs tool and the bruifer, and likewife to the 
metal upon the hones, and made the brafs convex tool fo 
hot as juft not to hurt the finger, I tied a lump of com- 
mon pitch (which fhould be neither too hard nor too 
foft) in a rag, and holding it in a pair of tongs over a ftill 
fire where there was no rifing duft, till it was ready to 
ftrain through the linen, I caufed it to drop upon the 
feveral parts of the convex tool, till I fuppofed it would 
cover the whole furface about double the thicknefs of a 
fhilling; then fpreading the pitch as equally as I could, I 
fuffered the poliflier (by which name I fliall for the 
future call this tool) to grow quite cold. I then warmed 
the bruifer fo hot as almoft to burn my fingers, and hav- 
ing fixed it to the bench with its face upwards, I fud- 
denlv placed the poliflier upon it, and quickly flid it off ; 
by this means rendering the furface of the pitch more 
equal. The pitch is then to be wiped off from the bruifer 
with a little tow; and by touching the furface with a 
tallow candle, and wiping it a fecond time, it will be then 
perfectly clean and fit for a fecond procefs of the fame 
fort, which muft again be performed as quickly as poflible ; 
and 
