23 lines, in ink, written in German. On 3½x5½" postcard, addressed to Wander Johannes de Haas in Holland, with Berlin postmark.

Dutch physicist and mathematician de Haas collaborated with Einstein in formulating the The Einstein–de Haas effect, a physical phenomenon delineated the mid 1910's, that exposes a relationship between magnetism, angular momentum, and the spin of elementary particles. The text of the letter translates as: "Got back last night from Gottingen and found your letter waiting for me. I have already written to an experienced freight company and have asked for an estimate. The freight company is without a doubt possible. I will contact the landlord in order to discuss the return of any rent money. The second half of July I will not be here I am going to Rugen. Through that trip, however, time will definitely not be lost, because I will give someone my power-of-attorney for this matter. You will hear again from me soon. That you are staying there pleases me for you and particularly for your little one, for whom it is infinitely better. Good luck with the experiment! Heartfelt greetings from Einstein."