Antique O.W. Gray's 1870s U.S. Botanical Divisions Map (16" x 19")This captivating antique map, measuring 16" x 19", illustrates the "Botanical Divisions" of the United States. It was originally published by O. W. Gray & Son, a prominent Philadelphia based publishing firm in the 1870s. O. W. Gray's "National Atlas" was highly successful, and the firm was notably one of the last commercial ventures of the late nineteenth century to employ hand coloring on their maps, which may be evident in this piece. The map