Russian physicist (1857–1935) who pioneered the study of rocketry and cosmonautics and whose discoveries were of crucial importance in the development of manned space travel. Very scarce partial ALS in Russian, four pages, lightly-lined on two adjoining sheets, 4.25 x 7, May 25, 1921. Letter to science writer Yakov I. Perelman. Letter thanking Perelman for a letter, book, and proposal to publish Tsiolkovsky’s articles in a journal. In fine condition, with punch holes to left side. RR Auction COA.
