go8 Mr. mudge on the Conjlruflion 
metal upon which the hone pavement is to be cemented 
may or may not, as you pleafe, be turned of a convexity 
fuitable to the gage, though I have never taken that 
trouble. As foon as the hones are cemented down, and 
the joints cleared by the faw, this tool mull be fixed in 
the lathe, and turned as exactly true to the gage as pof- 
fible ; which done, it muft be laid afide for the prefent. 
The next tool to be made is the bruifer. 
The manner of forming the bruifer, the fourth and 
lafl tool. 
This tool lhould be likewife made of thick flout brafs 
like the former, perfectly found, about a quarter of an 
inch thick, and hammered as near to the gage as pofli- 
ble. It fhould be then fcraped, cleaned, and tinned on 
the convex fide, as the former tool was on the concave, 
and the fame thicknefs of lead and tin caft upon it. The 
general fhape of this fhould differ from the former ; for 
as that increafed in diameter at the bottom for the fake 
of Handing firmly, fo this fhould be only as broad at 
bottom as at top, as it is to be ufed occafionally in both 
thofe petitions. When this tool is fixed in the lathe, and 
turned off concave to the convex gage with great truth 
likewife, 
