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sector

  • Images (5)

sector

Date: 1693-1740
Inventory Number: DW0289
Classification: Sector
Subject:
mathematics, drawing, artillery,
Maker: Pierre Alexis Lasnier (fl. 1734 - 1777)
Cultural Region:
France,
Place of Origin:
Paris,
Dimensions:
0.3 x 11.5 x 2.6 cm (1/8 x 4 1/2 x 1 in.)
Material:
brass,
Description:
French sector made of brass with the following scales:

side a:
line of equal parts ("les parties Egalles")
metals ("les / metaux")
caliber of pieces ("calibres des pieces")

side b:
line of chords ("les Cordes")
line of polygons ("les / poligones")
weight of shot ("poids des boulets")

The sector hinge has an engraving of a flower on each side. Scrollwork, friction blade fixed to the upper arm, in order to hold the arms at a set opening.

The engraving is somewhat crude.

Signedon upper arm: Lasnier
on lower arm: AParis
Curatorial RemarksXRF analysis of the metals was done by Katherine Eremin and Sara Schechner in August 2007.

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