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