Not only was his stipend as Repetent discontinued, but his nomination to the office of professor extraordinarius, which had already been signed by the minister Karl Altenstein, was withheld.
In that year Berzelius suggested Mitscherlich to the minister Altenstein as successor to M.
Altenstein did not immediately carry out this proposal, but he obtained for Mitscherlich a government grant to enable him to continue his studies in Berzelius's laboratory at Stockholm.
Altenstein even expressed his satisfaction with the book.
He declined the offer of a classical chair at Kiel, and accepted a post as tutor to the son of an intimate friend of Altenstein, the Prussian minister of education.
In 1833 Altenstein appointed Trendelenburg extraordinary professor in Berlin, and four years later he was advanced to an ordinary professorship. For nearly forty years he proved himself markedly successful as an academical teacher, during the greater part of which time he had to examine in philosophy and pedagogics all candidates for the scholastic profession in Prussia.