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Show Dz-illbrj Hard Siccl Kct Difficult ty New Plan In preptirins a drill to be used on hard slcl, the drill should be healed to t:n even red heat, the scale removed re-moved and the tip of the drill hi touched to a drop of quicksilver and then be qiioiihd ill water. After thif. treatment th: drill will go tbri u;;b the hardest steel without trovile. A simp method of tempering temper-ing small tools quickly Is- to heat tbcin red hot and th"n thrust them Into a potato, after which they should be drawn to the correct temper to remove re-move b. illlr tiess. |