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 Quadrant The instruments consist of an actual quadrant with an extended arm on one of the edges. The limb is engraved with an equal scale divided to 1/2, 1/4 and 1/8 from [0] to 12, numbered from 1 to 12 by 1. On the short edge is a scale, divided to 1/2 and numbered from the apex from 1 to 7, with dots each unit. The extended edge is engraved with the same scale but numbered from to 8 up to the limb and then again from 1 to 8 on the extension, with dots each half unit. The end of the arm has a decorated profile. The surface of the quadrant is engraved with a sinecal quadrant, with dots each unit. The other side of the quadrant is engraved in the same way, and has a radial rule fixed to the apex. The rule is engraved with a similar scale, divided to 1/2 and to 1/4, numbered from 1 to 10 starting from the apex. Ilaria Meliconi |