The Measurers:
a Flemish Image of Mathematics in the Sixteenth Century

Figure 26
An illustration of the use of Coignet's sector.

Coignet's sector is described in the manuscript illustrated in figure 7 and figure 8 and is used to perform calculations relating to volumes of wine in barrels.
Michel Connette [Coignet], La géometrie (Paris, 1626).

See also figure 27
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