Plan of the Patent Office model room, exhibiting the model cases, with the names of inventions contained therein / Library of Congress

Title: Plan of the Patent Office model room, exhibiting the model cases, with the names of inventions contained therein / drawn and published by Edmund Masson, consulting engineer, Patent Office draftsman and correspondent, office Northeast corner Seventh and F. streets, Washington, D.C.
Date Created/Published: Washington, D.C. : Published by Edmund Masson, c1868 ([Washington, D.C.] : Mitchener & Burke, printers, N.E. corner 9th and E streets)
Medium: 1 print : lithograph with watercolor and 5 albumen photographs.
Summary: Print showing interior plan of the Patent Office model room with photographic prints of the interiors of the North, West, and Blue halls, and an exterior view of the Patent Office from the southeast corner. Includes scale of feet.