Pocket clinometer and square in an embossed leather case by J. Marke
Pocket clinometer and square, in case, 1650-1675. The clinometer consists of two pinhole sights to be used with a quadrant scale which runs along the base and up the right-hand side of the instrument. The reverse carries an unusual form of engraved square for horary and trigonometric uses. There are two sets of parallel lines - one running vertically and one diagonally. The vertical lines are for hours, the diagonal lines represent degrees and are divided as sines. The instrument could be used to tell the time. Made by J. Marke, a well-known London instrument maker.
Details
- Category:
- King George III
- Object Number:
- 1927-1918
- Materials:
- metal (unknown) and leather
- Measurements:
-
case: length 140 mm
length 129 mm
width 115 mm
- type:
- clinometers, pocket clinometers and squares
- rights:
- Unlinked Name
- credit:
- King’s College London
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