Georgian Sector
Georgian Sector
Georgian Sector
Georgian Sector

Georgian Sector

c. 1800 England

Offered by Walpoles

£85 gbp
Request Information Call Dealer
Favourite Item
An ivory and brass sector, the invention of just such an instrument credited to Galileo Galilei in about 1597. However, it was the English mathematician, Edmund Gunter, who added to it the crucial logarithmic scales in about 1624. This allows the sector to be used as a straight logarithmic rule, or more importantly, it can be used in conjunction with a pair of dividers to make trigonometric calculations required for navigation at sea.
This example English, circa 1800.
8 7/8 inches long when fully opened.
Stock Code

5 Commonwealth Buildings
Woolwich Church Street
SE18 5NS

Contact Details
+44 (0)7831 561042
Email Dealer More Contact Details
Opening Hours
View Dealer Location
Member Since 2006
Members of
View Full Details