DEAN, JOHN. The Gray Substance of the Medulla Oblongata and Trapezium. 16 plates, including 9 photolithographs. [4], 75 pages. in: Smithsonian Contributions to Knowledge, Volume 16. 6 parts in one volume. Folio, modern buckram, original front wrapper mounted and bound in; preliminary leaf loose, institutional stamp on verso of plates, marginal restoration on last 2 leaves of last part. See Burns, Early Medical Photography in America VII, 1248. Washington, D.C.: Smithsonian Institution, 1870