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Plane table surround

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made in England

Plane table surround
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A plane table is flat board used by surveyors as a surface for sketching in the field. This plane table surround was made in England around 1750. It is made of boxwood and is unsigned.

The graduated surround fitted onto the edge of a plane table, and held the paper in place for the surveyor to make his measured drawings, using a detached straight rule (or alidade), a magnetic compass, and some kind of level, possibly as simple as a plumb-line.

The scales on the plane table surrounds are discussed in surveying textbooks by authors such as Aaron Rathbone and William Leybourn. Although this example is unsigned, it is marketed with a pattern of 6 fleur-de-lys stamps around a double circle surrounded by 4 smaller circles.

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