3i3 Mr. mudge on the Conjlru&ion 
grinding the metal, for if they he fuffered to grow dry, 
the fame inconvenience will arife. 
In order to give a proper figure to the hones, and 
exactly fuitable to that of the brafs tool, bruifer, and me- 
tal, when the hones are fixed down to the block, fome 
common flour emery (unwalhed) with a good deal of 
water muft be put upon them, and the bruifer being 
placed upon the hones and rubbed thereon with a few 
firokes and a light hand, the inequalities of the ftone w ill 
be quickly worn off; but as a great deal of mud will be 
fuddenly generated, it muft be wafhed off every quarter 
of a minute with a great deal of water. By a repetition 
of this, two or three times, the hones (being of a very foft 
and friable fubftance) will be cut down to the figure, 
without wearing or altering the bruifer at all. Though 
this bufinefs may be quickly done, and can be continued 
but for a few ftrokes at a time, I need not fay that it is 
neceffary that thofe ftrokes be carried in the fame direc- 
tion, and with the fame care, which was obferved in 
grinding the former tools together. 
As foon as the hones have received the general figure 
of the bruifer, and all the turning ftrokes are worn out 
from them, the emery muft be carefully waflied off; in 
order to which, it will be neceffary to clear it from the 
joints with a brufti under a ftream of water. The bruifer 
and 
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