In that year, he also published a German translation of Solomon Klein's "Die Wahrheit über den Talmud".
In 1884, he was appointed professor of exegesis and Aramaic of Hebrew Union College in Cincinnati, Ohio, as well as head of the Library.
He published several translations, including Henri Jean Baptiste Anatole Leroy-Beaulieu's Anti-Semitism in 1897 and Solomon Alami's Iggereth Musar in 1898.
[2] In 1869, Mannheimer married Louise Herschman in a ceremony conducted by Rabbi David Einhorn.
[6] Mannheimer died from myocarditis at the Home of Jewish Aged and Infirm in Cincinnati on December 18, 1909.