English brass Gunter quadrant, 17th century (4-1/2 inch radius) with degree scale and shadow square. Unsigned but design, lettering and decoration identical to 1938-386.
This unsigned English horary quadrant was made during the latter part of the seventeenth century. Made of brass the quadrant has engraved scales to a design conceived by the English mathematician Edmund Gunter in 1623. The horary quadrant was used for finding local time by sighting either the Sun or a bright star at night. Held vertically, a measurement could be taken from the position on the scale of a moveable bead on the thread of the instrument's plumb bob. The instrument was derived from the astrolabe and first appeared during the Medieval Period. Like its predecessor it includes a two-dimensional depiction of the heavens that is reduced to a quarter.
- Object Number:
- horary quadrant - gunter
- natural sciences
- physical sciences
- furnishing and equipment
- measuring device - instrument
- horary quadrant
- Taylor, C.P.
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.