Table of contents
February 23, 1861, Volume 4 No 8 (New Series) pp113-128
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Improved Hot Air Furnace, Why Does Gunpowder Drive a Ball from a Cannon?, and more - pp113 - 116
doi:10.1038/scientificamerican02231861-113
The Polytechnic Association of the American Institute - pp123 - 124
doi:10.1038/scientificamerican02231861-123
