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      July 31, 1886The Sciences

      Index of Inventions - July 31, 1886

      For Which Letters Patent Of Tbe United States Ldquo;"Ere GrantedJuly 13, 1886,AND EACH BEARING THAT DATE.[See Note At End Of List About Copies Of These Patents.]
      November 1, 1926Tech

      Patents Recently Issued, November 1926

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      February 19, 2009Sustainability

      Does cloud seeding work?

      China takes credit for the storms now bringing a reprieve from severe drought, but is that claim valid?
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      Scientific American Health & Medicine

      Scientific American Health & Medicine