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It exists in this state in immense masses, and forms a valuable buildingstone, as it can be cut with ease to any shape required, and, though soft when dug, it hardens by exposure to the air. It has also the valuable property of withstanding the greatest heat; and for furnace building it is superior to the best Stourbridge fire-bricks.
This is a fragment of excellent brick masonry in a wonderful state of preservation, consisting of walls, piers, and buttresses, and in places ornamented with pilasters, but of too fragmentary a character to furnish the modern inquirer with any clue to the original plan of the building. The bricks are of a pale yellow color and of the best possible quality, nearly resembling our fire-bricks.
Granite and china-clay, fire-bricks and fish are exported here, and the fishing done is fairly extensive. The harbourage is good, but rather difficult to make in rough weather; south-westerly winds drive the seas fiercely against its mouth.
The temperature required for the manufacture of the steel was higher than the melting point of most fire-bricks. Further endeavours also led to disappointments; but in the end the inventor was successful. He erected experimental works at Birmingham, and gradually matured his process until it was so far advanced that it could be trusted to the hands of others.
"Take any of the industries I have mentioned, that of brick-making, for example. Any one working at that trade should determine to learn all there is to be known about making bricks; read all the papers and journals bearing upon the trade; learn not only to make common hand-bricks, but pressed bricks, fire-bricks, in short, the finest and best bricks there are to be made.
The door of one furnace was blown clean out of its bolts; furnace bars and fire-bricks strewed the iron deck, while, each time the ship rolled, the heavy clank of loose metal somewhere in the engine-room proved that the damage was not confined solely to the stoke-hold.
The open court into which we entered, and where we found the family assembled, was evidently their living-room during the day. Four small apartments opened out of it. First, the kitchen, the whole furnishing of which consisted of a few fire-bricks, one or two vessels for cooking and a skin for holding water.
Stephenson’s most matured designs, and embodied all the improvements which he had contrived up to that time. No. I. engine, the “Locomotion,” which was first delivered, weighed about eight tons. It had one large flue or tube through the boiler, by which the heated air passed direct from the furnace at one end, lined with fire-bricks, to the chimney at the other.
Do you remember where we got the fire-bricks for the ovens? Mary was answering, when Walter came bursting through the crowd. 'Where is he? Fitzjocelyn, it is your turn. 'Here is a curious specimen for our great naturalist, said Mrs. Frost, a glow in her cheeks, and her voice all stifled mirth and mischief.
For ordinary purposes a 40-foot chimney is adequate for furnace work; such a chimney four feet square inside at the base, tapering to 2' 6" at the summit, will require 12,000 red bricks, and 1500 fire-bricks for an internal lining to a height of 12 feet from the base of the chimney shaft.
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