[6], 379 pp. 8x5, 19th century quarter straight-grained morocco & marbled boards, spine stamped in gilt. First Separate Edition. Investigation into the geology of the earth largely based on Humboldt's observations made during his American scientific journey. Humboldt's observations on the regularity of the sequence in development of the different kinds of rocks were of great influence on contemporary geology. First published in 1822 under the title "Indépendance des formations" in Levrault's "Dictionnaire des sciences naturelles." Sabin 33711. With the bookplate of John Sinkankas. Formerly in the Seattle Public Library, with gilt number on spine, gilt-stamp to cover, removal from rear pastedown, rubberstamp to title-page and a few other places, a few perforated stamps, etc.