m above described. The running head of the lathe requires particular men-tion. The mandrel should always be of steel, turned true,hardened, and trued by an emery wheel after the hardeningprocess. It should be well fitted to its bearing; for if it isnot, an unpleasant jarring noise will be produced… … to the floor. It is not an uncommon thing, when an unusual-ly large job is being done in the lathe, to brace or shore thelathe by means of braces placed between the lathe shearsand the floor, wall, and ceiling. Of this arrangement it issufficient to say that it is merely a makeshift, and is only…
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