Heating City Houses by Main Pipes. Artificial Butter. A New Use for Gun Cotton. A MICROMETER CALIPER. ASTRONOMICAL NOTES. Positions of Planets for January 18 77. Mercury. Venus. Mars. Jupiter. Saturn. Uranus. Neptune. Neptune. Sun Spots. POTS. By PROFESSOR C. V. RILEY., scientific american, 1877-01-06

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Heating City Houses by Main Pipes. Artificial Butter. A New Use for Gun Cotton. A MICROMETER CALIPER. ASTRONOMICAL NOTES. Positions of Planets for January 18 77. Mercury. Venus. Mars. Jupiter. Saturn. Uranus. Neptune. Neptune. Sun Spots. POTS. By PROFESSOR C. V. RILEY., scientific american, 1877-01-06

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