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Recently Patented Inventions
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Notes and Queries
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Weather Tests on the New York Underground Trolley Road - p194
doi:10.1038/scientificamerican03281896-194a
The Government Tests of the Strength of Timber - pp194 - 195
doi:10.1038/scientificamerican03281896-194b
The Hippopotamus in the Central Park Menagerie, New York City - pp201 - 202
doi:10.1038/scientificamerican03281896-201
