BELT, THOMAS (1832-1878), English geologist and nat uralist, was born at Newcastle-on-Tyne, and educated in that city. He spent eight years on the Australian gold fields and some time gold-mining in Nova Scotia, returning to England about 186o. In 1861 he issued a separate work entitled Mineral Veins: an Enquiry into their Origin, founded on a Study of the Auriferous Quartz Veins of Australia. He was searching for gold when he in vestigated the rocks and fossils of the Lingula Flags at Dolgelly, his observations being published in a now classic memoir in the Geological Magazine for 1867. He then spent four active and adventurous years in charge of some Nicaraguan mines, the re sults being given in his Naturalist in Nicaragua (1874), a work of high merit. In his scientific papers he dealt boldly and sug gestively with the phenomena of the Glacial period in Britain and in various parts of the world. After many further expeditions to Russia, Siberia and Colorado, he died at Denver on Sept. 21, 1878.