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Martin, Benjamin

MARTIN, BENJAMIN

(b. Worplesdon, Surrey, England, February 1704 [?]; d. London, England, 9 February 1782)

experimental philosophy, scientific instrumentation.

Benjamin Martin was the son of John Martin, gentleman, of Broadstreet, near Worplesdon. Nothing is known of his education, but it seems probable that in science he was self-taught. In 1729 he married Mary Lover of Chichester, and at the time of his marriage was described as a merchant of Guildford. The couple had two children, a daughter, Maria, and a son, Joshua Lover Martin, who joined his father in the 1770’s to form the firm of B. Martin and Son.

Soon after his marriage, Martin became a teacher, running his own boarding school at Chichester, where, in 1735, he published his first work, The Philosophical Grammar; it ran to eight editions. The second edition includes a description of a pocket microscope, suggesting that Martin was also engaged in inventing and possibly selling optical instruments. By 1743, he had become a traveling lecturer in experimental philosophy, for in that year he first published a textbook based on his course of lectures. Martin made a curiously inept attempt during this period to secure election to the Royal Society. In letters written in 1741 to Sir Hans Sloane and the duke of Richmond, he claimed that he found it an embarrassment when lecturing not to be a fellow, and therefore requested their support in acquiring the title. This approach found no favor at all, and Martin never achieved the desired fellowship.

By 1755 Martin had settled in London, for in January he launched a monthly journal, The General Magazine of Arts and Sciences, publication of which continued until 1765. Between September 1755 and May 1756, he set up in business at 171 Fleet Street. His shop soon became well-known for its extensive stock and for Martin’s popular lecture-demonstrations, following in the tradition of the Hauksbees and Desaguliers. Martin also stimulated business by his constant publication of catalogues of the scientific instruments that he supplied and pamphlets on a wide range of scientific subjects.

Although Martin claimed to have invented and improved numerous instruments, he is more accurately to be described as a retailer than as an instrumentmaker. Instruments bearing his name are to be found in many museums, and they cover a wide range of types. Among his inventions, the best known relate to the microscope. He is credited as the first to supply, in about 1740, a microscope fitted with a micrometer. To improve the image, he produced, from 1759, an objective with two lenses set one inch apart. It has been suggested that the screw thread on this type of objective has a linear descendant in the standard thread of the Royal Microscopical Society, which was established in 1858 and continues in use today.

Martin is remarkable as one of the great popularizers of science in the mid-eighteenth century. He became known internationally, and supplied Harvard College, Massachusetts, with a large proportion of the new instruments needed after the fire of 1764. Yet Martin’s industry and popularity did not bring financial stability. He was declared a bankrupt in January 1782, and died, a few weeks after a suicide attempt, on 9 February.

BIBLIOGRAPHY

Benjamin Martin’s publications are too numerous to cite here. P. J. Wallis lists more than sixty works in his biobibliography of British mathematical writers.

See also R. S. Clay and T. H. Court, The History of the Microscope (London, 1932), ch. 9; John R. Millburn, “Benjamin Martin and the Royal Society,” in Notes and Records of the Royal Society of London, 28 (June 1973), 15–23; “Benjamin Martin and the Development of the Orrery,” in British Journal for the History of Science, 6 (Dec. 1973), 378–399; G. L’E. Turner, “The Apparatus of Science,” in History of Science, 9 (1970), 129–138; John Williams, “Some Account of the Martin Microscope, Purchased for the Society at the Sale of the Late Professor Quekett’s Effects,” in Transactions of the Microscopical Society of London, n.s. 10 (1862), 31–41; and “A Few Words More on Benjamin Martin,” ibid., n.s. 11 (1863), 1–4, which lists forty works by Martin.

G. L’E. Turner

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