Linnaeus's address to the audience and the opponents at the public defence of Johan Christian Peter Petersen's dissertation, "Cortex peruvianus", to which he acted as 'praeses'.
Lidén no. 90.

In a letter to Bäck, Linnaeus wrote that the thesis was mainly written by Petersen's father, as the Germans usually do. He writes that it should have been changed all over, or left as it was, and its language is very inflated. If Linnaeus had changed anything, he would have been blamed for that, for Petersen is rather malicious. In the dissertation, it is said that the temperature increases in the higher parts of the country, which is quite opposite the truth, and other similar things.
Petersen would no doubt have said that Linnaeus had falsified his theses, if he had changed anything. Now, we can judge his wisdom from this dissertation. So, it will pass with all its errors, and it is already printed.
Carl Linnaeus to Abraham Bäck, 14 April 1758, "The Linnaean correspondence", linnaeus.c18.net, letter L2337.