British inventor who gave the first public demonstration of a working mechanical television (1926) and transmitted the first television signal between London and New York (1927). |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
American naturalist who studied and collected North American birds, mammals, and reptiles. He served as secretary of the Smithsonian Institution from 1878 to 1887. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.