Typed letter signed.
4to. 1 p. Accompanied by an envelope with 2 red lacquer seals of the institute.
To the Austrian physicist Heinrich Mache at the Vienna University of Technology, thanking for a collection of rare-earth elements which the Austrian scientist Carl Auer von Welsbach had donated, and sending 500 Danish Crowns to support the University's scientific projects.
On stationery with printed letterhead of the Universitetets Institut for Teoretisk Fysik. Traces of folds.