Published by MacMillan and Co., London, 1871
Seller: JF Ptak Science Books, Hendersonville, NC, U.S.A.
Soft cover. Condition: Good. Article appears in a very early volume of the journal "Nature", November 16, 1871, pp 46-8, in the issue of pp 41-56. Offered in the weekly issue, with the original wrappers, removed/extracted from a larger bound volume.
Published by The Cleveland Boomerang School, Euclid, OH, 1983
Seller: Twice Sold Tales, Capitol Hill, Seattle, WA, U.S.A.
Saddle stitch, 76 pages. Condition: Very good. Second printing. Light wear and soiling to cover. Saddle-stitch binding tight, staples a little rusty. Pages clean.