6 Neuzugänge
zu den Filteroptionen- being a course of 12 lectures delivered at the Royal Institution of Great Britain in the season of 1862London : Longman [u.a.], 1863
- New ed., carefully rev., London : Potter, 1861
- an historical and critical essay with special reference to educational reformLondon : Stanford, 1870
- with a map shewing the distribution of Indian languagesLondon : Trübner, 1868