KONSTANTIN TSIOLKOVSKY
(1857 - 1935) Pioneering Russian scientist and rocket designer who laid out the basic principles of modern space flight. Lengthy A.D.S. on the front pastedown of what once served as Tsiolkovsky's notebook, 14 lines in his hand which no doubt describe the contents of the notebook, dated 1931 at bottom and signed. Certainly worthy of a full translation. Binding holes at right margin, else very good condition.