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 width of a well to measure its depth. 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: | 3777 px × 4724 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |