Six inch brass sector, 1720-1753.

Made:
1720-1753 in London
maker:
Thomas Heath
Six inch Brass sector  1720-1753 signed T Heath Fecit, decorated on hinge and legs with floral patterns. Sectors were Six inch Brass sector  1720-1753 signed T Heath Fecit, decorated on hinge and legs with floral patterns. Sectors were

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Six inch Brass sector 1720-1753 signed T Heath Fecit, decorated on hinge and legs with floral patterns. Sectors were
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Six inch Brass sector 1720-1753 signed T Heath Fecit, decorated on hinge and legs with floral patterns. Sectors were
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Six inch Brass sector signed T Heath Fecit, decorated on hinge and legs with floral patterns

Six inch Brass sector 1720-1753 signed T Heath Fecit, decorated on hinge and legs with floral patterns. Sectors were used from the end of the 16th century until the mid 19th century to perform calculations involving proportion. They were inscribed with logathmic and trigonometric lines and lines used for drawing and calculating surfaces and volumes.

Details

Category:
Mathematics
Object Number:
1970-511
Measurements:
overall (lying flat): 2 mm x 160 mm x 77 mm, .118 kg
type:
sector
credit:
Sotheby and Compan