Table of contents
April 15, 1865, Volume 12 No 16 (New Series) pp239-254
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Improved Water Motor, A Strong Room, and more - p239
doi:10.1038/scientificamerican04151865-239
Polytechnic Association of the American Institute - p242
doi:10.1038/scientificamerican04151865-242
The Cheapest Mode of Introducing Inventions - p253
doi:10.1038/scientificamerican04151865-253
A Valuable Work for Inventors Patentees and Manufacturers - p253
doi:10.1038/scientificamerican04151865-253a
