Areometers & Specific Gravity Balances
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Nicholson
hydrometer
Areometer (cylinder diameter: 4.4 cm) made of sheet iron
and lead cone, both enamelled blue. In cylindrical can
enamelled blue and gold (diameter: 7.5 cm, length: 29
cm), paper label with the written text "Aréomètre
de Nicholson".
French, unsigned, middle of 19th century.
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Indicators for specific gravity measurement
Set of 33 indicators (minerals, crystal fragments, glasses) arranged by specific gravity from 2.067 to 3.295 in a wooden box (13.3 x 10 cm) covered with boards. The box is divided in small compartments each with a label to determine the indicator. A manuscript leaf in the cover describes the contents of the box indicating the material, the specific gravity and the color and shape of the fragments.
Printed on the cover "Indicatoren | zur | Mechanischen | Gesteins – Analyse | nach Prof. V. Goldschmidt.", ca. end of 19th century.
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