Abstract
In the Vienna Circle archives in Haarlem, NL, there are a great number of protocols connected with Moritz Schlick’s philosophical chair – manuscripts, typescripts and shorthand manuscripts. They contain extensive and detailed information about Schlick’s seminars and also about the elementary seminars, so-called proseminars, which were held, as the documents explain: “bei Prof. Schlick”, but actually after 1929 not by him. Since his arrival in Vienna, Schlick was responsible for these both types of seminars and they were under his supervision. They are documented mainly by students. The different participants had the task of producing a handwritten report of the meeting, later also typescripts. It is not mentioned in the protocols who was responsible for the elementary seminars. The professor was the person who mattered. It is interesting to observe that while Schlick’s seminars mainly contained descriptions of chapters in philosophical books, the proseminars were more ambitious