See Chaucer's own treatise on The astrolabe, which he describes.
The rest of the voyage of the astrolabe was in well-known waters.
In 1114, the right word is site; cf. the Treatise on the astrolabe (see Note).
This Chaucer says plainly, in his Treatise on the astrolabe, pt.
Chaucer uses the term 'root' again in B. 314; and in his astrolabe, ii.
Little Lewis had asked him if he might learn something about an astrolabe.
One of the Tables or discs, used by being dropped within the depression on the front of the astrolabe; i. 17.
This, however, was a 'sufficient' astrolabe for the purpose.
The astrolabe had anchored in the same depth, and upon a similar bottom.
About the early printed editions of the astrolabe, I have not much to say.
An ancient instrument used widely in medieval times by navigators and astronomers to determine latitude, longitude, and time of day. The device employed a disk with 360 degrees marked on its circumference. Users took readings from an indicator that pivoted around the center of the suspended device like the hand of a clock. The astrolabe was replaced by the sextant in the 18th century.