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SECRETARY OF THE SMITHSONIAN INSTITUTION
THE ANNUAL REPORT OF THE BOARD OF REGENTS OF THE
INSTITUTION FOR THE YEAR ENDING JUNE 30, 1921.
Washington, April 18, 1922. To the Congress of the United States:
In accordance with section 5593 of the Revised Statutes of the United States, I have the honor, in behalf of the Board of Regents, to submit to Congress the annual report of the operations, expenditures, and condition of the Smithsonian Institution for the year ending June 30, 1921. I have the honor to be, Very respectfully, your obedient servant,
CHARLES D. WALCOTT,
Letter from the secretary, submitting the annual report of the Regents
General subjects of the annual report---
The historic development of the evolutionary idea, by Branislav Pet-
The heredity of acquired characters, by L. Cuénot_
Breeding habits, development, and birth of the opossum, by Carl Hartman_
Some preliminary remarks on the velocity of migratory flight among
birds, with special reference to the Palæarctic region, by R. Meinertz-
A botanical reconnaissance in southeastern Asia, by A. S. Hitchcock----
Ant acacias and acacia ants of Mexico and Central America, by W. E.
The fall webworm, by R. E. Snodgrass_-
Collecting insects on Mount Rainier, by A. L. Melander.
The science of man: Its needs and its prospects, by Karl Pearson -
Pigmentation in the old Americans, with notes on graying and loss of
hair, by Aleš Hrdlička -----
Ancestor worship of the Hopi Indians, by J. Walter Fewkes.
The Indian in literature, by Herman F. C. Ten Kate.
Leopard-men in the Naga Hills, by J. H. Hutton.-
A new era in Palestine exploration, by Elihu Grant-
The alimentary education of children, by Marcel Labbé.
A 50-year sketch-history of medical entomology, L. 0. Howard
Laid and wove, by Dard Hunter_..-
Lead, by Carl W. Mitman..
William Crawford Gorgas, by Robert E. Noble.