The New International Encyclopædia/Dall, William Healy

DALL, William Healy (1845—). An American naturalist, born in Boston. He was a special student under Louis Agassiz. In 1865-68 he accompanied the International Telegraph Expedition to Alaska, and from 1871 to 1884 he was on the United States Coast Survey of Alaska. Since 1880 he has been attached to the United States National Museum, and since 1893 he has been professor of invertebrate paleontology at the Wagner Institute of Science, Philadelphia. He is the author of numerous papers on mollusks, brachiopods, and the natural history of Alaska. Important among his works are: Alaska and Its Resources (1870); Reports of the Mollusca of the Blake Expedition (1880-90); Mollusca of the Southwestern Coast of the United States (1890).