The collection comprises correspondence, mainly concerning meteorological readings and Daniell's religious beliefs, lecture notebooks and printed pamphlets on meteorology and the battery, certificates of membership of learned societies, and obituaries and biographies of Daniell, 1821-1990. Notably including correspondence between Daniell and friends and colleagues such as Charles Babbage, Lucasian Professor of Mathematics, University of Cambridge, Charles James Blomfield, Bishop of London, Sir Marc Isambard Brunel, engineer, Samuel Taylor Coleridge, poet, Michael Faraday, Joseph Louis Gay-Lussac, chemist, John Frederic William Herschel, astronomer, James Clark Ross, polar navigator, principally concerning meteorology and meteorological instruments, the chemistry of batteries, the publication of Daniell's books and articles, the management of the Royal Society, London, Daniell's religious beliefs, 1821-1857; manuscript copies of lectures delivered by Daniell including at King's College London and the Military School of the East India Company, Addiscombe, Surrey, 1831-1845; printed articles and pamphlets by Daniell or reviews of his work, including On voltaic combinations (London, 1836), reviews of Meteorological essays and observations (London, 1823), 1823-1860; membership certificates of Daniell to various learned societies including National Institute for the Promotion of Science, Washington, US, 1839-1845; obituaries and biographies of Daniell, 1845-1990.