Letter from Mary O. Smith to Theodore Roosevelt
Subject(s): Inventions
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Mary O. Smith informs Theodore Roosevelt of her invention of the pluraphone–a multi-headed megaphone that broadcasts sound equally to all sides. Smith is soliciting feedback from people who she believes might be interested in such an invention before she approaches manufacturers with her idea, and asks Roosevelt for his opinion of it.
Collection
Library of Congress Manuscript Division
Creation Date
1911-03-16
Creator(s)
Recipient
Roosevelt, Theodore, 1858-1919
Language
English
Period
Progressive Party Candidate (1911-1912)
Repository
Library of Congress Manuscript Division
Page Count
2
Production Method
Record Type
Multi-image
Resource Type
Rights
These images are presented through a cooperative effort between the Library of Congress and Dickinson State University. No known restrictions on publication.
Citation
Cite this Record
Chicago:
Letter from Mary O. Smith to Theodore Roosevelt. [March 16, 1911]. Library of Congress Manuscript Division.
https://www.theodorerooseveltcenter.org/digital-library/o65812. Theodore Roosevelt Digital Library. Dickinson State University.
MLA:
Smith, Mary O.. Letter from Mary O. Smith to Theodore Roosevelt. [16 Mar. 1911]. Multi-image.
Library of Congress Manuscript Division. Theodore Roosevelt Digital Library. Dickinson State University. January 23, 2026. https://www.theodorerooseveltcenter.org/digital-library/o65812.
APA:
Smith, Mary O.., [1911, March 16]. Letter from Mary O. Smith to Theodore Roosevelt.
Library of Congress Manuscript Division. Theodore Roosevelt Digital Library. Dickinson State University.
Retrieved from https://www.theodorerooseveltcenter.org/digital-library/o65812.
Cite this Collection
Chicago:
Library of Congress Manuscript Division. https://www.theodorerooseveltcenter.org/collection/library-of-congress-manuscript-division. Theodore Roosevelt Digital Library. Dickinson State University.
MLA:
Library of Congress Manuscript Division. Theodore Roosevelt Digital Library. Dickinson State University. January 23, 2026. https://www.theodorerooseveltcenter.org/collection/library-of-congress-manuscript-division.
APA:
Library of Congress Manuscript Division. Theodore Roosevelt Digital Library. Dickinson State University. Retrieved from https://www.theodorerooseveltcenter.org/collection/library-of-congress-manuscript-division.
