- Vergleichende Grammatik Des Sanskrit, Zend, Griechischen, Lateinischen, Litthauischen, Altslawischen, Gothischen Und Deutschen, Volumes 1-2
- Grammar of the language of the Lenni Lenape or Delaware Indians
- A Comparative Grammar of the Sanskrit, Zend, Greek, Latin, Lithuanian, Gothic, German, and Sclavonic Languages, Volume 2 - Primary Source Edition
- A Comparative Grammar of the Sanskrit, Zend, Greek, Latin, Lithuanian, Gothic, German, and Sclavonic Languages, Volume 3
- Glossarium comparativum linguae sanscritae, in quo omnes sanscritae radices et vocabula usitatissima explicantur et cum vocabulis graecis, latinis, germanicis, lituanicis, slavicis, celticis comparant