(Martin), an English antiquary, mathematician, and philosopher, was born at Westminster about 1600; and was greatly distinguished as a member of the Royal Society in London, and of the Academy of Sciences at Paris. He was admitted into the former at 24 years of age; made one of their council two years after; named by Sir Isaac Newton himself as vice-president; and, after Sir Hans Sloane, became president. There are numerous Memoirs of his in the Philosophical Transactions. Coins, ancient and modern, were a great object with him; and his last production was a book upon the English Silver Coin, from the conquest to his own times. He died at London in 1754. Dr Birch had drawn up materials for a life of Mr Folkes, which are preserved at large in the Anecdotes of Bowyer, p. 562, et seq.