Table of contents
Recently Patented Inventions
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Notes and Queries
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Patent Bills and Petitions Now Before Congress - pp160 - 161
doi:10.1038/scientificamerican03121892-160
A Lecture Barometer - p164
T. O'conor Sloane, Ph. D.
doi:10.1038/scientificamerican03121892-164a
Apparatus for Aerial Ascensions - pp167 - 168
J. Henry Smith
doi:10.1038/scientificamerican03121892-167