Excerpt from Gas Manufacture: The Chemistry of a Practical Handbook on the Production, Purification, and Testing of Illuminated Gas, and the Assay of the Bye-Products of Gas Manufacture; For the Use of Students, Chemists, and Gas Engineers
The enormous growth of the Gas Industry during the past twenty years and the many new departures in the manufacture and application of gas have rendered the older works on Gas Manufacture comparatively useless to the modem student; it was, therefore, with pleasure that I undertook, at the request of the publishers, to endeavour to place at his disposal a text-book embodying the more recent advances.
The raw materials - e.g., coal, coke, oil, &c. - commonly used in the manufacture are dealt with in Chapter I. Following this arc two chapters dealing solely with the production of coal gas, which still forms the bulk of the illuminating gas of the world. The modern improvements in apparatus and the most advanced methods of purification are dealt with in these chapters. The recent extensive employment of petroleum for gas-making has almost revolutionized some branches of the industry, and Chapters IV., V., and VI. are chiefly concerned with methods of utilizing mineral oils. The immense importance of a knowledge of the components of gas as a guide to its application, and, also, as an aid at different stages of its manufacture, justifies the introduction of a special chapter on Gas Analysis.
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