After five years Göttingen he was appointed to the University of Berlin in 1918 but after he had been there for a year, at the request of the Greek government, he ended his contract with Berlin on 31 December 1919 and travelled to Greece to undertake a new venture.
Pagkatapos ng limang taon Gottingen siya ay hihirangin upang angkinin ang University of Berlin sa 1918 ngunit matapos siya had been diyan para sa isang taon, sa kahilingan ng pamahalaan ng Griyego, niya natapos ang kanyang kontrata sa Berlin sa 31 Disyembre 1919 at manlalakbay sa Griyego upang magsagawa ng isang bagong venture.