Practical trigonometry. 17th century woodcut illustration showing the use of a cross-staff and quadrant for measuring distances. In this image,the upper panel shows how to measure height given the distance to an object,in the lower panel an intermediate reference point is used. 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: | 3503 px × 5315 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |