Images relating to acoustic signaling by means of Reginald Fessenden’s electric oscillator. In “Submarine Signaling,” Scientific American Supplement, No. 2071, pp. 168-170, Sept. 11, 1915.
| 576 x 640 | 69.70 KB | |
| 1151 x 1280 | 248.48 KB | |
| 1820 x 2024 | 701.54 KB |
| Added On | 18th October 2015 |
| Viewed | 17 viewed |
| Downloads | 2 Downloaded |