There is an interesting cartoon in the book
Lillian Hoddeson, Ernst Braun, Jurgen Teichmann, Spencer Weart (Eds.) Out of the Crystal Maze: Chapters from The History of Solid State Physics. Oxford Univesity Press, 1992 (online here)
The cartoon (see below) appears on page 15 and depicts recognizably professorial types exchanging books for cartoonish bags of coins brought by recognizably capitalist types. Hovering over the scene are a sun-like Felix Klein and an angelic-looking Friedrich Althoff, depicted as bestowing blessings upon the congregants. The book says that the cartoon dates from 1908 but does not provide any additional details.
Question 1. Where did the cartoon first appear in 1908?
Question 2. Who created the cartoon?
Question 3. Althoff died on 20 october 1908. Did the cartoon appear before or after his death in 1908?
Question 4. There are several books that have reprinted this cartoon and they all seem to agree that the cartoon originates from 1908. Where did they get this information from?
Question 5. Armin Hermann writes in his 1991 book that the cartoon was distributed with the invitations to a february 1908 meeting at Goettingen, as pointed out in this answer. Where does Hermann's information come from?