Table of contents
May 12, 1860, Volume 2 No 20 (New Series) pp305-320
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The Carding Machine—A Truly Great Invention - p305
doi:10.1038/scientificamerican05121860-305a
Literary and Scientific Notices - pp306 - 307
doi:10.1038/scientificamerican05121860-306a
The Hexagonal Cell of the Honey-Bee - p310
W. J. Weeks
doi:10.1038/scientificamerican05121860-310
Polytechnic Association of the American Institute - pp310 - 311
doi:10.1038/scientificamerican05121860-310c
Is a Patent Liable to Levy and Sale on Execution? - p313
doi:10.1038/scientificamerican05121860-313a
New Books and Periodicals Received - pp318 - 319
doi:10.1038/scientificamerican05121860-318b