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PIERRE SEVIN, 1672
细节
FOUR-VANE SURVEYING CIRCLE
PIERRE SEVIN, 1672
the brass body with two non-linear scales below signature Pierre Sevin APairs 1672, the circumeference with two scales 0-180°-0, the inner divided to ½°, an eight point compass rose to alidade
7½in. (19cm.) diam.
PIERRE SEVIN, 1672
the brass body with two non-linear scales below signature Pierre Sevin APairs 1672, the circumeference with two scales 0-180°-0, the inner divided to ½°, an eight point compass rose to alidade
7½in. (19cm.) diam.