19th Century astronomical chronograph. Historical artwork of an American astronomical chronograph from 'Handbook of Descriptive and Practical Astronomy' (1890). These devices were used to record measurements over time,using mechanical or electrical methods to trigger the recordings. The apparatus would involve a clock,as well as a recording mechanism | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Royal Astronomical Society |
Bildgröße: | 4996 px × 3577 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |