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Signature	Maker	Instruments	Comments	Location	References
VERNIER, PIERRE	France, 1584-1630, MIM		in 1631 invented a subsidiary scale to accurately subdivide the principal scale; it is still in use today; wrote a book on the quadrant.	Ornans.	A.J. Turner 10; Michel 3; Daumas 1.
VERNIER, PIERRE	France, 1584-1630, MIM		in 1631 invented a subsidiary scale to accurately subdivide the principal scale; it is still in use today; wrote a book on the quadrant.	Ornans.	A.J. Turner 10; Michel 3; Daumas 1.

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