Klein suggested to Freundlich that he might wish to apply for a post as an assistant at the Royal Observatory in Berlin and his appointment was confirmed on 1 July 1910.
Klein iminungkahing sa Freundlich na siya maaaring gusto ninyong mag-aplay para sa isang post bilang isang assistant sa Royal obserbatoryo sa Berlin at sa kanyang appointment ay na-confirm sa 1 Hulyo 1910.