Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1848 Excerpt: ...of the screen, in giving the surface of the larger stones a uniform height or level before being covered with the smaller, ith. Fig 34 is called a beater, being a square piece of wood, the width of the drain, with a handle, and used for beating the smaller stones into the interstices of the larger ones, and levelling them into an even surface. The stones are put into the drain in this manner. The earth should at first have been put on one side of the drain. The barrow-screen, fig. 32, is placed on the other, so that the board e, attached to the lower end of the spout d, shall just reach the opposite side of the drain k. The cart, with a load of broken stones from the bin, is brought a little in advance of the barrow, and the tail-board a, fig. 32, is then attached to the hinder part of it. The carter, on removing the tailboard belonging to the cart, shovels the Stones out of the cart, and throws each shovelful over the top of the screen; but in doing this, care is requisite, for if the stones are thrown over the screen with force, they will not alight sooner than half-way down the wires, and then their efficient screening will be impaired. The proper method is to rest the shovel upon the top of the screen, which part should be protected with plate-iron, and merely give the handle of the shovel a slight turn, when the stones will be released; the larger ones, rolling down, strike against the board e, fig. 31, and drop into the middle of the drain, without disturbing the earth on either.side. The smaller stones, at the same time, pass through the upper screen b, and falling upon the lower one g, roll into the barrow a; whilst the rubbish in passing through the lower screen g, falls upon the ground on the outside of the barrow farthest from the drain. Prize Es...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1848 Excerpt: ...of the screen, in giving the surface of the larger stones a uniform height or level before being covered with the smaller, ith. Fig 34 is called a beater, being a square piece of wood, the width of the drain, with a handle, and used for beating the smaller stones into the interstices of the larger ones, and levelling them into an even surface. The stones are put into the drain in this manner. The earth should at first have been put on one side of the drain. The barrow-screen, fig. 32, is placed on the other, so that the board e, attached to the lower end of the spout d, shall just reach the opposite side of the drain k. The cart, with a load of broken stones from the bin, is brought a little in advance of the barrow, and the tail-board a, fig. 32, is then attached to the hinder part of it. The carter, on removing the tailboard belonging to the cart, shovels the Stones out of the cart, and throws each shovelful over the top of the screen; but in doing this, care is requisite, for if the stones are thrown over the screen with force, they will not alight sooner than half-way down the wires, and then their efficient screening will be impaired. The proper method is to rest the shovel upon the top of the screen, which part should be protected with plate-iron, and merely give the handle of the shovel a slight turn, when the stones will be released; the larger ones, rolling down, strike against the board e, fig. 31, and drop into the middle of the drain, without disturbing the earth on either.side. The smaller stones, at the same time, pass through the upper screen b, and falling upon the lower one g, roll into the barrow a; whilst the rubbish in passing through the lower screen g, falls upon the ground on the outside of the barrow farthest from the drain. Prize Es...
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