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    • Power Production in the United States - Nature

      Nature· 4 days ago

      THE chief sources of energy to-day in the United States are coal and petroleum, which between them account for more than 90 per cent of the demand, water power supplying only 10 per cent. A ...

    • The New Pharmacopœia of the United States - Nature

      Nature· 4 days ago

      THE history of the various editions of the United States Pharmacopœia presents some points of in terest. The first Pharmacopœia, published both in Latin and English, appeared in 1820, and so ...