r ■$ % 8 z -Mr. * mu.dge , on 'the ConjlruBwn 
neceffary; to. keep the. bench quite wet, to .prevent any 
puhifrpna jifing. 
" Haying them made the polifher. by coating the brafs 
- convex tool n equally <; with pitch, which we fuppofe 
Smoothed and finifhed with the brafs tool in the manner 
before defcribed, and which is . a very eafy procefs, the 
whole operation is begun. and. finilhed in the following 
manner. 
The leaden weight or handle upon the back of the 
inetal Hr on! d be divided into eight parts, by fo many deep 
ftrokes of a graver upon the upper furface of the lead, 
marking each ftroke with the numbers i, 2, 3, 4, and fo 
on, that the turns of the metal in. the hand may be 
known to be uniform and regular. 
To prevent any mifcliief from coarfe particles of 
putty, Lai ways. walla it immediately before ufing. In order 
, .£0 this, put about half an ounce of putty into an ounce 
phial, and fill it two-thirds with water; then having 
. Ihaken the whole, let the putty fubfide, and flop the 
; bottle with a cork. 
'lira tea-cup with a little water j there fhould be a full- 
fized camel’s-hair brufh, and a piece of dry clean foap in 
a galley- pot : a foft piece of fpunge will alfo be neceflary. 
Thefe, as well as the metal bruifer and polifher, fhould 
. be cqnflantly covered from dull. 
The 
