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Graphometer

Catalogue number:
PH*318175

Inscriptions:
"Meurand à Paris"

Dimensions:
10.5 inches long

Discussion:

The semicircle of this graphometer is graduated to single minutes, numbered clockwise and counterclockwise, and read by verniers at either end of the alidade to 6 minutes. Meurand worked as an instrument maker in Paris in the latter years of the 18th century.

Ref:

Maurice Daumas, Scientific Instruments of the Seventeenth and Eighteenth Centuries, English trans. by Mary Holbrook (New York, 1972), p. 100 and 282.

Further Information:

Graphometer