Jena: Verlag von Gustav Fischer, 1911. Hardcover. viii, 218p., hardbound in 9x6 inch marbled boards with cloth backstrip gilt. From the personal library of Karl H Niebyl who started a marxist lending library in the San Francisco Bay Area; bears the faint shadow of a now-removed spine label, shelfwear to boards, spine lettering somewhat eroded from handling. An easily-handled reading copy.