File:The fireside university of modern invention, discovery, industry and art for home circle study and entertainment (1902) (14799223543).jpg

Identifier: firesideuniversi01mcgo (find matches)
Title: The fireside university of modern invention, discovery, industry and art for home circle study and entertainment
Year: 1902 (1900s)
Authors: McGovern, John. (from old catalog)
Subjects: Science
Publisher: Chicago, Union pub. house
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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nglish scientists.Probably there was no book in England that dealt with thelearning of the alchemists. But did not the English make the first practical use of thisknowledge of Gas? Yes. Murdoch erected Gas-works in Cornwall, in 1792. Biringham and other cities were lighted early in the nineteenthcentury. Moscow did not obtain commercial Gas until 1866. Describe t he modern Gas- Works. The most notable construction is the Gas-holder. This is thereservoir for the supply. It is a vast tank upside down. Itssides are in water, and as the Gas enters, the tanks top rises up,sometimes with telescopic sections, enlarging as it rises. At darkthe tank towers high, and sinks as the Gas escapes all night intothe service pipes. There may be several Gas-holders, accordingto the consumption in the area covered by the Company. Butthe holders are made very large, and often there is but one. What is the Gas Retort? It is one of the ovens set over the fire. A furnace has four 340 THE FIRESIDE UNIVERSITY.
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Fig. 124. APPARATUS FOR ILLUSTRATING THE MANUFACTURE OF ILLUMINATING GAS. brick tubes or ovens, usually flat on the bottom and circularoverhead. In these tubes, nine feet long, the coal is baked orroasted until it gives off all its vapor. What is Coke? It is the coal after it has been thus baked. Where does the Vapor or Gas go? It rises in an ascension pipe leading out of each retort. Theascension pipes unite above and pass in a tortuous way over ahydraulic main or trench of water, into which tar and otherheavy matters drop. This main runs to the tar-well. As theGas passes away from the fire and presses forward to get out,the pushing from behind is cut away as much as possible, inorder to obtain a better quality with more time for chemicalaction. What is the Scrttbber ? This is a purifier for the purpose of removing ammonia com-pounds. The object is to give the ammonia the widest oppor-tunity to meet water, with which it has a remarkable affinity,and to give the hydrogen and carbon, w

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