1 6 2 D O C U M E N T 8 9 P O E M F O R G R Ü N B E R G Istdann damit man zu End gehts an das Experiment Man enträtselt Denkt Euch nur! das Geheimnis der Natur.[5] — Doch das Söhnchen unterdessen Träumet noch vom Abendessen Und erlaubt mit Toleranz uns den ganzen Mummenschanz — Rüstet man sich dann zum gehen Solltet Ihr das Söhnchen sehen! Es rumoret wie verrückt Und sein Papa ist entzückt. — Heute, das weiss ich gewiss Hat vor Bolschi niemand Schiss Feiern thut der Freunde Runde die gewohntevertraute Geisterstunde. — Bei dem Knax der Lebensuhr Freut sich jede Kreatur Also Freunde wunderbar Soll es sein in jedem Jahr. ADft. [31 033]. On verso of an unidentified typescript [31034] that might be a fragment of the ma- nuscript Rudolf Seeliger sent to Einstein (see Doc. 13). [1] Josef Grünberg (1877–1932) was the Russian-born German-Jewish orthodontist of several prominent patients, among them Einstein. He was also an art collector, benefactor, and amateur artist. [2] Dated by the fact that the document is on the verso of [31 034], that is most likely from 1927, and on the assumption that the poem was written for Grünberg’s birthday on 17 November. [3] Probably Grünberg’s residence at Kurfürstenstrasse 124, to which he had moved in 1927 (see Adreßbuch Berlin 1930). [4] Grünberg presumably earned his nickname because of his Russian origin. [5] Perhaps an experiment related to the innovative printing procedures that Grünberg worked on for the SPOG group, an art and printing collective, whose other members were the artists Max Slevogt, Bernhard Pankok, and Emil Orlik. 