314 .Mr. mudge on the ConJlruBion 
deftroy the perfect contadl between the two tools; and 
therefore they muft every now and then be walked clean 
by throwing fome water -upon them. When by work- 
ing in this manner all the emery ftrokes- are ground oft* 
from the bruifer, and it has acquired a good figure and 
clean furface, you may then begin with the metal upon 
the hones, in the fame cautious manner, walking off the 
mud as faft as it collects, though that will be much lefs 
now than when the bruifer was ground upon them... 
Every now and then, however, the bruifer muft be rube- 
fied gently and lightly upon the hones, which will as it 
were, by lharpening them and preventing too- great 
fmoothnefs, occafion them to cut the metal much rafter. . 
When, after having fome time cautioully wrought in 
the manner before deferibed, the hone-pavement has 
uniformly taken out all the emery ftrokes, and given a 
fine face and true figure to the metal, which will be 
pretty well known by the great equality there is in the 
feel while you are working, and by which an expe- 
rienced workman will form a pretty certain judgment ; 
having proceeded thus far, I fay, you may then try your 
metal, and judge of its figure by this more certain 
manner. 
Wafh the hone pavement quite clean; then put the 
metal upon the center of it, and give two or three light 
1 ftrokes 
