Washington: Philosophical Society of Washington, 1893. First Edition, First Printing. 5 7/8 X 9 1/4 Inches. Item #2770
Very scarce original tract from the first Senior Geologist of the US Geological Service. Gilbert's study of the moon led him to be the first to correctly identify the craters on the moon as having been caused by impact. This text reprints the address Gilbert gave as retiring President of the Society on December 10, 1892. Gilbert is widely known to students of geology for his work on the Meteor Crater in Arizona as well as his studies of the San Andreas fault and the Rockies.
100% complete first separate printing (pages numbered 241 to 292). Remnants of original issue covers crudely glued to new paper wrap. This copy from the Geology Department of the University of Southampton, with a few associated stamps.