Observationes anatomicae, quibus varia oris, oculorum & narium vas describuntur novique salivae, lacrymarum & muci fontes deteguntur.

Includes the first account of the excretory duct of the parotid gland (“Stensen’s duct”), discovered by Stensen. He first reported his discovery in a letter to his teacher, Thomas Bartholin, dated April, 22, 1661. Stensen was also the first mention the ceruminous glands in this work. Facsimile reproduction, with English translation, Copenhagen, 1951.