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by The Library of Congress
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![Identified! [Martha Anne Scott Hazard at the National Capital Horse Show 1911, May 4-6. Building in back is Frazee Potomac Laundry, 18th Street and D Street, N.W., Washington, D.C. (NW Corner)] (LOC)](http://farm66.static.flickr.com/65535/49375597223_e41ff163bc_m.jpg)
by The Library of Congress
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by The Library of Congress
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![Identified! [Man preparing a "smoked paper" to be used in a seismograph, probably at Georgetown University]](http://farm66.static.flickr.com/65535/52054175856_aa3bd78073_m.jpg)
by The Library of Congress
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![Identified! [Frontiersman Richard Clarke (1845-1930) dressed in Western clothes during a visit to President Calvin Coolidge at the White House, Washington, D.C.] (LOC)](http://farm66.static.flickr.com/65535/50547538401_dc6b0e4266_m.jpg)
by The Library of Congress
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![Described! [Man, possibly William B. Greene, with model for a machine that appears to be designed to scoop up sand or gravel] (LOC)](http://farm66.static.flickr.com/65535/49351094462_9e14903906_m.jpg)
by The Library of Congress
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![Identified! [A Jenkins Television Co. worker with device to broadcast motion pictures over radio signals]](http://farm66.static.flickr.com/65535/52054403779_19f8e9a726_m.jpg)
by The Library of Congress
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by The Library of Congress
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![Identified! [Postmaster General Harry S. New, standing next to the largest airmail letter ever sent, from the Greater Muskegon (MI) Chamber of Commerce commemorating the opening of airmail service between Muskegon and Chicago] (LOC)](http://farm66.static.flickr.com/65535/50546807758_9f5aa0f398_m.jpg)
by The Library of Congress
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![Identified! [American cryptographer William Friedman with a Western Electric-manufactured printing telegraph]](http://farm66.static.flickr.com/65535/52054198488_a591d93882_m.jpg)
by The Library of Congress
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by The Library of Congress
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by The Library of Congress
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![[Tidal basin bathing with stuffed alligator on beach, Washington, D.C.] (LOC)](http://farm66.static.flickr.com/65535/50147467558_d23d0e7eee_m.jpg)
by The Library of Congress
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![["Alex," prize German police dog and pet of Miss Ailsa Mellon, daughter of Treas. smokes cigarettes n'everything. Alex's father is the $12,000 prize police dog "Wolfe"] (LOC)](http://farm66.static.flickr.com/65535/51375673491_f230a19ff0_m.jpg)
by The Library of Congress
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No known copyright restrictions(著作権制限なし)

by The Library of Congress
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