markings in degrees
Portugal
18th Century
Recipe Details
Evidence
"On the disc markings in degrees (4 × 90°), and a compass card with 32 divisions, protected by a glass inserted into the crown."
Remarks
Inscribed ink markings on a cardboard disc used for navigation. Includes degree markings (4 x 90 degrees) and 32 divisions for a compass card (p. 75).
Scientific Analysis
Certainty Level
Inferred
Instrumentally Verified
Not Verified
Metadata
Material Type
ink
Paper Typecardboard disc
RegionPortugal
Approx. Year1750
Source Information
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