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Instruments & Measurements
INSTRUMENTS AND MEASUREMENTS STAMPS
from Scott Standard Postage Stamp Catalogue
Optical Instruments - Germany B583-586.
Royal Microscopical Society - Great Britain 1285-89.
Metric Convention - Sweden 1121; France 1435; Switzerland 599.
Metric System - Brazil 940; Japan 673; Korea 428; Mexico C241.
Guillaume - Sweden 1343.
Maupertuis and LaCondamine - Finland 741; France 2016.
Celsius - Sweden 1402.
Great Trigonometrical Survey - India
Greenwich - Great Britain 1058-61.
Gregorian Calendar - Germany 1383; Aztec Yugoslavia RA34PT32.
Compass - P.R. China 198; Germany 696.
Seismograph - P.R. China 199.
Marine Chronometer - Great Britain 1489-92.
