cohol will be found most efficacious and cleanly in- with a piece of emery-cloth wrapped round a file, place stead of putting oil upon the stone. Another most important question is the proper the shaft of the tool in the flame of the gas-burner, the brightened end being clear of the flame by about… … at the different marked line be- FIG. 30. — TIGHE HAMILTON S PATENT DOVETAILING MACHINE. shades of colour, tween two colours when the nature of the steel is entirely unknown. The towards the edge of the cutters, it is very likely to chip operation of tempering should always be performed or break at…
Industrial arts · Handicraft
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