After his return from England in 1833 he went to live with his mother at the old manse in Concord, Mass., and began his career as a lecturer in Boston.
In 1912 he was Gif ford lecturer at Edinburgh.
Round each lecturer in 22, Sultans private entrance.
In 1891 he was appointed lecturer in physics at Stockholm and four years later became full professor.
He gained a first class in jurisprudence in 1895 and was Vinerian Law Scholar in 1896, was elected a Fellow of Merton and did a considerable amount of educational work in the next few years, being a lecturer both at Merton and at Oriel, and an extension lecturer in modern history both for Oxford and for Victoria University.
In 1844 he entered St John's College, Cambridge, where he was senior wrangler in 1848, and gained the first Smith's prize and the Burney prize; and in 1849 he was elected to a fellowship, and began his life of college lecturer and private tutor.
In 1850 he became vice-principal and Hebrew lecturer at St David's College, Lampeter, where he introduced muchneeded educational and financial reforms. He was appointed select preacher of Cambridge University in 1854, and preached a sermon on inspiration, afterwards published in his Rational Godliness after the Mind of Christ and the Written Voices of the Church (London, 1855).
In 1831 he returned to Berlin as lecturer on technology and physics at the university.
In 1567 he was elected a fellow of his college, and subsequently was chosen lecturer of St Clement's church, Cambridge, where he preached to admiring audiences for many years.
He took a first class in the final mathematical school in 1854, and the following year was appointed mathematical lecturer at Christ Church, a post he continued to fill till 1881.