Volume 8, Issue 12
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Features
Recent Changes in the Patent Law
Natural Colored Photographs
Valuable Receipts
Linseed and its Oil
Implement for Threading Needles
Domestic Manufactures
Take Care of the Machinery
The Engineering Enterprise of London
Do Inventions Benefit the Working Classes
The New Atlantic Telegraph
Hair and Wool--Their Nature and Uses
Boring Steam Cylinders
Miscellaneous Summary
Recent American Patents
Patent Claims
Issued from the United States Patent Office