| RefNo | ACS/1/2/1/488 |
| AltRefNo | 540 |
| Level | Item |
| Title | Letter from [Alan Archibald Campbell] Swinton, to The Editor, "Nature" |
| Creator | Swinton; Alan Archibald Campbell (1863-1930); British electrical engineer |
| Date | 26 February 1921 |
| Description | Believes it may be of interest to record some experiments he recently undertook on the application of a thermionic amplifier to increase the volume of the sounds produced by Dr Fournier d'Albe's optophone, as to render these sounds audible to everyone in a room, without the necessity of each listener being furnished with a separate telephone receiver. Informs that the experiment was carried out at the instance of Mr C. R. McCarthy, who is teaching blind soldiers to read with this instrument, and who asked Swinton whether it is possible to magnify the sounds sufficiently to enable a class of a dozen or more to hear them simultaneously. Discusses the apparatus and his approach, commenting that despite his considerable success, further experimentation is desirable to obtain the best results. |
| Extent | 2p |
| Format | Typescript |
| PhysicalDescription | Carbon |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8285 | Swinton; Alan Archibald Campbell (1863 - 1930); electrical engineer | 1863 - 1930 |