Einstein Eagerly Awaits the Next Draft of a Great Work Analyzing the Scientific/Philosophic Basis of His Own Relativistic Space-Time

Reichenbach’s grand goal was to place Einstein within the scientific-philosopher lineage that had for centuries tried to define the nature of space and time.  In doing so, he states that Einstein knew that his work was philosophical as well as scientific in nature. Reichenbach aimed to prove that, “It would be erroneous to say that Einstein’s contribution consists only in the establishment of a physical theory; he has always been aware of the fact that his theory is based upon a philosophical discovery."

Reichenbach maintained a close relationship with Einstein and, in fact, solicited Einstein’s opinion on his work as it was preparing for publication.  In early 1922, Einstein had received a proof of Reichenbach's paper "The Current State of Discussions on Relativity. A Critical Investigation.”  He wrote back with specific comments, indicating his interest in the work, largely approving of Reichenbach's treatment, and praising the comparison between Relativity and the work of Kant.  Einstein kept track if the work, and eagerly wrote Reichenbach to see how his progress was coming and hoping to see another draft.

Autograph letter signed, Berlin, September 20, 1922, asking for a meeting with Reichenbach for an in-person update.  "Dear Mr. Reichenbach, Although I am at the point of leaving, I would be very pleased if you told me a little about the progress you are making in the axiomatic analysis. On Saturday would be most preferable to me. On Monday I am not sure anymore whether I shall still be here. Best regards, yours,  A. Einstein.” With the verso addressed in Einstein’s holograph.

Reichenbach's analyses of Einstein remains among the most respected contemporary works on this subject.  We do not recall any other situation in which Einstein collaborated on a work analyzing his own theories (providing the complex interplay between of the nature of space and time, as viewed in science and in philosophy), nor so eagerly followed its progress.