Lectures On Commerce Delivered Before the College of Commece And Administration
Lectures On Commerce Delivered Before the College of Commece And Administration
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In our eReader you can find the full English version of the book. Read Lectures On Commerce Delivered Before the College of Commece And Administration Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lectures On Commerce Delivered Before the College of Commece And Administration
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One is the hot blast. In the old days cold air was used in the blast furnace. Now the air is heated to about the temperature of melted lead before it is admitted to the furnace. This reduces the amount of coal necessary. Forty or fifty years ago it took six or seven tons of coal to make a ton of iron. Now it is made with one ton of coal to a ton of iron. Mr. Carne- gie, the most successful steel-maker in the world, has made a ton of iron with a little less than 1, 800 pounds of coal. You can se...e what an enormous change that is, to make a ton of iron with one-sixth of the coal that was formerly necessary. This aided in the production of cheap steel.
Another great step was made by Siemens, who in- vented the regenerative furnace. The principle on which this works is very simple. Suppose a furnace THE STEEL INDUSTRY 139 like the open-hearth furnace. Into this two passages lead, and these passages are filled with holes every six or eight inches, with bricks laid between them ; so that about half the space is filled with bricks, between which the air passes.
What to read after Lectures On Commerce Delivered Before the College of Commece And Administration?
You can find similar books in the "Read Also" column, or choose other free books by Henry Rand Hatfield to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
One is the hot blast. In the old days cold air was used in the blast furnace. Now the air is heated to about the temperature of melted lead before it is admitted to the furnace. This reduces the amount of coal necessary. Forty or fifty years ago it took six or seven tons of coal to make a ton of iron. Now it is made with one ton of coal to a ton of iron. Mr. Carne- gie, the most successful steel-maker in the world, has made a ton of iron with a little less than 1, 800 pounds of coal. You can se...e what an enormous change that is, to make a ton of iron with one-sixth of the coal that was formerly necessary. This aided in the production of cheap steel.
Another great step was made by Siemens, who in- vented the regenerative furnace. The principle on which this works is very simple. Suppose a furnace THE STEEL INDUSTRY 139 like the open-hearth furnace. Into this two passages lead, and these passages are filled with holes every six or eight inches, with bricks laid between them ; so that about half the space is filled with bricks, between which the air passes.
What to read after Lectures On Commerce Delivered Before the College of Commece And Administration?
You can find similar books in the "Read Also" column, or choose other free books by Henry Rand Hatfield to read onlineMoreLess
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