‘With his sharp lok perseth the sonne’: A new quadrant from Canterbury
Elly Dekker
Summary This paper describes a medieval instrument, quadrans novus, which turned up during archaeological works in England. The invention of the instrument by Profacius 1288 is discussed terms two other instruments, vetus and common astrolabe. characteristics present are compared with those seven known quadrants. It shown that new quadrant was made England for explicit use Sun.
Annals of Science