Mairéad Ní Ghráda (1899-1971)

Mairéad Ní Ghráda (1899-1971)

Born in Co Clare

Graduate in Irish and a member of the Gaelic League. She worked as a teacher, civil servant, and may have been the first women radio announcer in Europe. She wrote Irish language textbooks for schools, short stories, and many plays. In 1964, her Irish language play, An Triail, dramatized the practical and social problems faced by single pregnant girls. It was disturbing and thought-provoking at the time and was translated into English as On trial.

This 1923 issue of Radio World magazine would have the copyright renewed in 1951. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [1] Search of the Renewals for Periodicals for 1950, 1951 and 1952 show no renewal entries for Radio World. Therefore the magazine's copyright was not renewed and it is in the public domain.

Retrieved March 1, 2014 from Radio World, Hennessey Radio Publications Corp., New York, Vol. 2, No. 26, March 24, 1923, p. 17 on Google Books

Onóir O Brien

March 1923

This 1923 issue of Radio World magazine would have the copyright renewed in 1951. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [1] Search of the Renewals for Periodicals for 1950, 1951 and 1952 show no renewal entries for Radio World. Therefore the magazine's copyright was not renewed and it is in the public domain.

Woman tuning early radio, from 1923 radio magazine. Broadcasting had just begun in 1920 and vacuum tube radio receivers like this had just come on the market.. They ran off batteries, usually a 3-6V storage battery to power the vacuum tubes' filaments and a 30-90V "B" battery to provide the plate voltage. This woman kept forgetting to turn off the set, running the battery down, so she has wired a small indicator lamp (on top of radio) in the filament circuit to remind her. The early vacuum tubes could not produce much audio power, so early radios used horn loudspeakers, like the one on top of the set. The horn coupled sound from the speaker's diaphragm to the outside air better, and so could produce 10 times (10 dB) more sound power from a given audio signal than a cone speaker. Caption: A fair fan's idea that saves a lot of worry when she shuts off for the evening. Miss Margie O'Neil found that she sometimes went to her downy and forgot to turn the current off her Magnavox, with the result that her battery was run down the next morning. So she placed a small 6V lamp in series with the battery line, which warns her to "turn off". Alterations to image: Removed aliasing artifacts (crosshatched lines) introduced when the original halftone photo was scanned, using Gimp FFT filter.

174 × 240 pixels | 349 × 480 pixels | 436 × 600 pixels | 559 × 768 pixels | 1,060 × 1,457 pixels.Original file ‎(1,060 × 1,457 pixels, file size: 244 KB, MIME type: image/jpeg)

Irish language

MIME image/jpeg

‎1,060 × 1,457 pixels, file size: 244 KB,

559 × 768 pixels | 1,060 × 1,457 pixels.