Simple Ventilator. The Heliograph in War. RECENT DECISIONS RELATING TO PATENTS. United States Circuit CourtDistriet of New Hampshire. Supreme Court of the United States. United States Circuit CourtSouthern District of New York. William E u nis. Fuel from Hay Straw Flax Etc. The New Mineral Hiddenite. A Remedy for Scale Bugs. THE 1847 MACHINE, scientific american, 1881-05-14

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