Volume 12, Issue 23
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Features
Polytechnic Association of the American Institute
Recent English Patents
Recent American Patents
Miscellaneous Summary
Another Application of Dialysis
Farmers' Club
Western Correspondence
Books and Publications
Graperies and Horticultural Buildings
Pickering's Governor
Petroleum for Steam Ships
Leather Bands
Letters From the People
The Art of Observation
Patent Claims
Issued from the United States Patent-Office