Linnaeus's address to the audience and the opponents at the public defence of Johan Sahlberg's dissertation (?), Henric Gahn's dissertation "Fundamenta agrostographiae" (27 June 1767), and Anders Johan Blad's dissertation "Fundamenta entomologiaeto" (14 June 1767), to which he acted as 'praeses'.
Lidén no. 152, 154.

There is no dissertation by Sahlberg in the Linnean dissertations.