Gas-Mantle Lighting Conditions in Ten Large Cities in the United States (Classic Reprint) - Hardcover

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Excerpt from Gas-Mantle Lighting Conditions in Ten Large Cities in the United States<br/><br/>The alignment of the units as a whole and of the various parts of the units was, in general, good, both as regards those on company maintenance and those which were not so maintained. How ever, several per cent of the units were noted as more or less faulty in this particular.

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