Table of contents
Recently Patented Inventions
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The Patent Centennial Celebration - pp224 - 225
doi:10.1038/scientificamerican04111891-224b
Experimental Science - p237
Geo. M. Hopkins, By
doi:10.1038/scientificamerican04111891-237a
The Scientific American Publications for 1891 - p237
doi:10.1038/scientificamerican04111891-237b
The Scientific American Established 1846 - p238
doi:10.1038/scientificamerican04111891-238