Mercury Thermometer for Underground Temperatures, 1861-1881
- maker:
- Casella, L. P.
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LicenseMercury maximum thermometer of the Phillips type by L
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Mercury maximum thermometer of the Phillips type by L. Casella, protected by a glass sheath and in a copper case, as used by the British Association between 1868 and 1881, to measure the rate at which the temperature of the Earth increases with depth.
