Specifications and Drawings of Patents Issued from the U.S. Patent Office

Specifications and Drawings of Patents Issued from the U.S. Patent Office

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Enough diluted acetic acid to cover the lead wire is then poured into the tubs of the upper tier, and is immediately drawn off ... If desired, hot air of a temperature of ninety degrees (90Ad) Fahrenheit, more or less, may be forced into the tubs toanbsp;...


Title:Specifications and Drawings of Patents Issued from the U.S. Patent Office
Author: United States. Patent Office
Publisher: - 1872
ISBN-13:

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