This interesting lot features the "Map of the United States showing the principal Geological Formations by Cha's H. Hitchcock Ph. D." This double page sheet is 26 x 16" and details six different geological types via color. "Climatological Map of the United States Showing Average Temperature Amount of Rain Fall &c. by Lorin Blodget", double page, 26.2 x 16". "Map of the United States showing the principal Botanical Divisions, by Thomas C. Porter, A.M.", single page, 14.9 x 11.7". "Map of the United States showing the principal Zoological Divisions By Professor Edward D. Cope A.M.", single page, 14.9 x 11.7".

References:

Condition: B

Some light offsetting, else very good.