Excerpt from A Handbook of Practical Gas-Fitting: A Treatise on the Distribution of Gas in Service Pipes, the Use of Coal Gas, and the Best Means of Economizing Gas From Main to BurnerI take this opportunity of thanking the many firms who have so kindly allowed me the use of electros of their specialities. My thanks are also due to Mr G. Pepper and other gentlemen, to whom I am indirectly very much indebted, for valuable information, the sourc...
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