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Johann Christoph Keller
Johann Christoph Keller
was a mathematician from
Linz
and is known as the maker of several sundials which can be dated to
circa
1600.
For instruments by Johann Christoph Keller, see:
Equinoctial Dial, Signed by Johann Christoph Keller, Linz, circa 1580 (Oxford, MHS)
Inclining Dial, Signed by Johann Christoph Keller, Linz, circa 1600 (Oxford, MHS)
References:
E. Zinner,
Deutsche und Niederl?ndische astronomische Instrumente des 11. bis 18. Jahrhunderts
(2nd ed., Munich, 1967), p. 404.