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Marsh on Religious Toleration,' 8vo, 1810. 6. 'A Course of Lectures, containing a Description and Systematic Arrangement of the Several Branches of Divinity,' 8vo, 1810. 7. 'The Question Examined whether the Friends of the Duke of Gloucester in the Present Contest are the Enemies of the Church,' 1811. 8. 'A Defence of the "Question Examined,"' being a Reply to an Anonymous Pamphlet,' 1811. 9. 'Vindication of Dr. Bell's System of Tuition,' 8vo, 1811. 10. 'A Letter to the Right Hon. N. Vansittart, being an Answer to his Second Letter on the British and Foreign Bible Society,' 8vo, 1812. 11. 'Letter and Explanation to the Dissenter and Layman who has lately addressed himself to the Author on the Views of the Protestant Dissenters,' 8vo, 1813. 12. 'Letter to the Rev. P. Gandolphy in Confutation of the Opinion that the Vital Principles of the Reformation have been lately conceded to the Church of Rome,' 8vo, 1813. 13. 'National Religion the Foundation of National Education,' 8vo, 1813. 14. 'Appendix to "A Comparative View,"' &c, 8vo, 1816. 15. 'A Reply to a Pamphlet entitled "The Legality of the Questions proposed by Dr. Marsh"' &c, by a Layman,' 8vo, 1820. 16. 'A Refutation of the Objections advanced by the Rev. J. Wilson against the Questions proposed to Candidates for Holy Orders,' 1820. 17. 'The Conduct of the Bishop of Peterborough explained with reference to the Rector and Curate of Byfield,' 1824. 18. 'Statement of Two Cases Tried, one in the King's Bench and the other in the Arches Court, on the subject of his Anti-Calvinistic Examination of Candidates for Holy Orders, and Applicants to Preach or hold Livings in his Diocese' (n.d.) 19. Charges to the clergy of Llandaff, 1817, of Peterborough 1820, 1823, 1827, 1831.  MARSH, JAMES (1794–1846), chemist, born 2 Sept. 1794 (Vincent), studied chemistry with great success, especially devoting himselt to poisons and their effects. He was employed for many years as practical chemist to the Royal Arsenal at Woolwich, and on Faraday's appointment to the Royal Military Academy in December 1829 became his assistant there. He remained there till his death at a salary of only thirty shillings a week.

Marsh was the inventor of electro-magnetic apparatus, for which he received the silver medal of the Society of Arts, with thirty guineas, in April 1823. He also invented the test for arsenic which bears his name, and the first account of which was published in the 'Edinburgh Philosophical Journal' for October 1836. This paper was translated into French by J. B. Chevallier and J. Barse in 1843, and into German by A. L. Fromm in 1842. In recognition of this valuable toxicological discovery the Society of Arts awarded him their gold medal in the same year. Among his other inventions were the quill percussion tubes for ships' cannon, and for this he received the large silver medal and 30l. from the board of ordnance. The Crown Prince of Sweden sent Marsh a small silver medal as a mark of appreciation of his services to science.

He died on 21 June 1846, leaving a wife and family unprovided for.

Besides the paper on 'The Test for Arsenic' already recorded, Marsh wrote five others, on chemical and electrical subjects, which appeared in 'Tulloch's Philosophical Magazine' and the 'Edinburgh Philosophical Magazine ' between 1822 and 1842.  MARSH, JOHN (1750–1828), musical composer, born at Dorking in Surrey in 1750, was in 1768 articled to a solicitor at Romsey, and became a distinguished amateur composer and performer. He married in 1774, and resided in turn at Salisbury (1776-81), Canterbury (1781-6), and Chichester (1787-1828), in all of which places he led the local bands and occasionally acted as deputy for the cathedral and church organists. He died at Chichester in 1828. He wrote ' A Short Introduction to the Theory of Harmonics,' London, 1809; 'Rudiments of Thorough Bass,' London, n. d.; 'Hints to Young Composers,' London, n. d.; composed 'Twenty-four new Chants in four Parts,' and edited ' The Cathedral Chant-Book,' and a ' Collection of the most popular Psalm-Tunes, with a few Hymns and easy Anthems,' London, n. d. His other compositions included glees, 