![Radio Days: Inventing American Broadcasting, 1899-1922. Susan J. Douglas. Johns Hopkins University Press, Baltimore, 1987. xxx, 363 pp., illus. $29.50. Johns Hopkins Studies in the History of Technology. | Science Radio Days: Inventing American Broadcasting, 1899-1922. Susan J. Douglas. Johns Hopkins University Press, Baltimore, 1987. xxx, 363 pp., illus. $29.50. Johns Hopkins Studies in the History of Technology. | Science](https://www.science.org/cms/10.1126/science.239.4846.1436/asset/5d59e95c-64b3-4ba4-a9e2-bcbda0983f50/assets/science.239.4846.1436.fp.png)
Radio Days: Inventing American Broadcasting, 1899-1922. Susan J. Douglas. Johns Hopkins University Press, Baltimore, 1987. xxx, 363 pp., illus. $29.50. Johns Hopkins Studies in the History of Technology. | Science
![American broadcasting;: A source book on the history of radio and television (Studies in public communication): Lawrence W. Lichty, Malachi C. Topping: 9780803803626: Amazon.com: Books American broadcasting;: A source book on the history of radio and television (Studies in public communication): Lawrence W. Lichty, Malachi C. Topping: 9780803803626: Amazon.com: Books](https://m.media-amazon.com/images/I/91yjzrC3YUL._AC_UF1000,1000_QL80_.jpg)
American broadcasting;: A source book on the history of radio and television (Studies in public communication): Lawrence W. Lichty, Malachi C. Topping: 9780803803626: Amazon.com: Books
![Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented](https://c8.alamy.com/comp/2B02PKN/edwin-howard-armstrong-december-18-1890-january-31-1954-was-an-american-electrical-engineer-and-inventor-he-has-been-called-the-most-prolific-and-influential-inventor-in-radio-history-he-invented-the-regenerative-circuit-while-he-was-an-undergraduate-and-patented-it-in-1914-followed-by-the-super-regenerative-circuit-in-1922-and-the-superheterodyne-receiver-in-1918-armstrong-was-also-the-inventor-of-modern-frequency-modulation-fm-radio-transmission-armstrong-was-born-in-new-york-city-new-york-in-1890-he-studied-at-columbia-university-he-later-became-a-professor-at-columbia-2B02PKN.jpg)