Memoir upon the formation of a deaf variety of the human race / by ALexander Graham Bell.

Washington, D.C. : [s.n], 1884.]

86 pages, 1 unnumbered folded leaf of plates ; 30 cm

Half-title

At head of t.p. : National Academy of Sciences

A paper presented to the National Academy of Sciences at New Haven, November 13, 1883, and published in its Memoirs, 1884, v. 2, p. 177-262

Includes bibliographic footnotes