Practical trigonometry. 17th century woodcut illustration showing the use of a cross-staff and quadrant for measuring distances. Here an observer is using the known distance to an object to measure its height. This illustration was first published in Quaestiones geometricae by Peter Ryff,printed at Frankfurt in 1621 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Middle Temple Library |
Bildgröße: | 4830 px × 3896 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |