Accession No
0751
Brief Description
Eighteenth-century brass semi-circular protractor by M. Voight.
Origin
Maker
Voigt. M.
Class
drawing
Earliest Date
1700
Latest Date
1800
Inscription Date
Material
metal (brass)
Dimensions
length 132mm; breadth 91mm
Special Collection
Robert Whipple collection
Provenance
Purchased from L.H. Spero, Kenton, Harrow, on 22/02/1933.
Inscription
‘M. Voigt Fec. Eutien.’
Description Notes
Brass; graduated [0] - 180˚, numbered by 10˚, divided to 30´´, and graduated 180˚ - [0], numbered by 10˚. Pointed index cut into diameter with decorative scroll either side. Bevelled inner edge of limb graduated with sides of regular polygon 4 - 15 by 1. Engraved ribbons on diameter.
Condition: good.
References
Events
Description
The protractor is a drawing instrument, used for measuring and drawing angles. Protractors began to appear in the sixteenth century, often in sets of drawing instruments which also included rulers, scales, dividers, squares and sectors, and were originally used with sea charts. Simple semicircular protractors work by showing how many degrees in an angle when one line of a shape is placed along the base line of the protractor with the point of the angle in the centre.
FM:40220
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