proportional compass and caliper
Date: 1813-1839
Inventory Number: DW0717
Classification: Proportional compass
Dimensions:compass: 31.5 × 2.4 × 2.2 cm (12 3/8 × 15/16 × 7/8 in.)
case: 33.4 x 3.4 x 3 cm (13 1/8 x 1 5/16 x 1 3/16 in.)
Accessories: case
Description:
Proportional compass with the steel points. The long divider points are here replaced by caliper points. The cursor is tightened in place by a large, knurled thumbscrew.
There is just one sector scale on the compass--a line of "Lines" (or equal parts).
The case is oblong and has two brass latch hooks. It is covered in red leather and lined in red velvet.