This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...but a large force can always be kept employed on a very large mass until it is entirely cut up. The quantity that three men ...Read MoreThis historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...but a large force can always be kept employed on a very large mass until it is entirely cut up. The quantity that three men can cut in a day will generally be about three-quarters of a foot, which, supposing the mass to be one foot thick, would bring the cut back nine inches. The contracts are let by the foot. When the miners' wages arc about 50, the contracts are let at 12 per foot, the miners furnishing their own lights. Skilled men will make about 2.50 per day at that price. The responsible man in the work is the holder; the amount of work done in a day depends almost entirely upon him. A good chisel-holder is an expert, and consequently a difficult man to get; under him the strikers work hard, but accomplish a great deal. A poor holder will make the strikers work quite as hard, but they will make very little progress in the cutting. A good holder, while he keeps the strikers in constant activity, will carry no more on his chisel than they can keep constantly driving. He will keep his cut perfectly straight from the top to the bottom, so that there will be no shouldering on the side, or digs into the mass. A poor holder will have too light a chip, in which case the chisel will be out before it is halfway through the cut, or too heavy a one, in which ca-e the work of the strikers is greatly increased without its efficiency being as great as with the proper depth of chip. It was formerly the practice to make the chip of equal thickness; they are now made feather-edged or wedge-shaped. This is much easier on the strikers, requiring much lighter blows, and is much more effective. A good holder will take a chip out of both side9 of the cut, and then run his chisel through the centre and take out the ridge in the...Read Less
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