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“James Dwight Dana.” (1813-⸺.) An American geologist and mineralogist; the author of several works on these and other sciences. He went out as mineralogist and geologist appointed by the United States Government with the exploring expedition sent to the Southern and Pacific Oceans in 1838, and returned in 1842. For the next fourteen years he was busily engaged in preparing for publication the reports of this exploration. These were published by the government and formed valuable records. For many years he was one of the editors of the American Journal of Science and Arts. He has been elected to membership in several learned European societies and royal academies.