. The railroad and engineering journal . 0 sq. meters. Surface of the top of the block. sq. meters. Total weight of the anvil-block. 1,000 tons. The air cylinder is made in two pieces, as already stated ;the usual working pressure employed is 5 atmospheres. Vol. LXII, No. II.] ENGINEERING JOURNAL. 503 CHAPTER XXII. THE MARREI. lOO-TOM HAMMER. Experience having shown that the l(X)-ton hammer atCreusot and the 80-ton hammer of St. Chamond were veryuseful for the forging of steel ingots up to two meters indiameter, the firm of Marrel Brothers have decided tobuild, and have begun the constr
. The railroad and engineering journal . 0 sq. meters. Surface of the top of the block. sq. meters. Total weight of the anvil-block. 1,000 tons. The air cylinder is made in two pieces, as already stated ;the usual working pressure employed is 5 atmospheres. Vol. LXII, No. II.] ENGINEERING JOURNAL. 503 CHAPTER XXII. THE MARREI. lOO-TOM HAMMER. Experience having shown that the l(X)-ton hammer atCreusot and the 80-ton hammer of St. Chamond were veryuseful for the forging of steel ingots up to two meters indiameter, the firm of Marrel Brothers have decided tobuild, and have begun the construction of, a single-acting cannon of large caliber, shafts and cranks for large marineengines, and finally to steel armor-plates ofgreat thickness. The foundations of the hammer are placed on a rock,the surface of which has been dressed off perfectly levelto receive a bed of cut-stone masonry, upon which is placedanother bed of oak timbers strongly bolted together andintended to serve both as a support for; the iizmn THE MARREL loo-TON HAMMER. 100-ton hammer, which will be placed in their Etaingsforge at Rive-de-Gier. This hammer is represented in the accompanying illus-tration, fig. 70 being a side elevation, fig. 71 a front eleva-tion, fig. 72 a plan, figs. 73, 74 and 75 showing the con-struction ol the foundation and the anvil. It is intendedto forge heavy pieces of steel, such as tubes and hoops for which rests upon it, and as a spring to take up part of theshocks. The anvil-block is composed of seven pieces arrangedin four rows, the three lower ones being each in two partsjoined together by rings or hoops put on hot ; the upperpiece, which receives the lower die, is in a single piece,its weight being 120 tons. The four rows are joined to- 504 THE RAILROAD AND [November, 1888. gether by means o( a number of keys, which make them ineffect a solid block. The total weight of the anvil-block is500 tons. The frames are of cast iron. They rest upon seat
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