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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
The Daily Dispatch: September 25, 1862., [Electronic resource] 2 0 Browse Search
Mrs. John A. Logan, Reminiscences of a Soldier's Wife: An Autobiography 1 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
ating of indurated metal on the outside of the article, which will not be subject to ordinary abrasion or the action of a file. A simple method of case-hardening small cast-iron work is to make a mixture of equal parts of pulverized prussiate of potash, saltpetre, and sal-ammoniac. The articles must be heated to a dull red, then rolled in this powder, and afterwards plunged into a bath of 4 ounces of sal-ammoniac and 2 ounces of the prussiate of potash dissolved in a gallon of water. Sheehan packs a layer of limestone in the bottom of the box, and then layers of a composition alternating with and inclosing the iron to be steelified. The composition is, — charcoal saturated with water, 200; chloride sodium, 30; sal soda, 12; pulv. rosin, 5; black ox. manganese, 5; mixed. Lute on the top, heat, remove while hot, and plunge into cold water. Case—knife. A large table-knife. It was formerly kept in a case or sheath, and the name is a remembrance of the good (?) old times w