12 Observations of the Sures Spots. 4I 4 04 AN AIR-DIRECTING DEVICE FOR ELECTRIC FANS. THE TRIPP AIR-DIRECTING DEVICE FOR FANS. The Current Supplement. RECENTLY PATENTED INVENTIONS. Agricultural Implements. Electrical Apparatus. Engineering Improvements. Gas Apparatus. Mechanical Devices. Miscellaneous inventions. Designs. 'Zusirtess arta (Wersailai. HINTS TO CORRESPONDENTS., scientific american, 1900-07-11
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