116 pp. Bound in gold cloth with black lettering on the spine. Translated, with an introduction by Maria Reichenbach. The first edition in English of Reichenbach's treatise on the epistemelogical implications of Einstein's theory of relativity, particularly in connection with Kant and the epistemelogical tradition that followed his Critique of Pure Reason. Reichenbach was one of five students who attended Einstein's first course on the theory of relativity at the University of Berlin in 1919 and was inspired to write this book (dedicated to Einstein) which was originally published in German in 1920. An especially attractive copy of this important part of 20th-century philosophical and scientific history, and uncommon thus. A Fine book in a Near Fine price-clipped dust jacket with a few tiny spots of rubbing.