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Reversing mercury thermometer for taking sea temperatures at depth by Negretti and Zambra

Reversing mercury thermometer for taking sea temperatures at depth by Negretti and Zambra

1877-1878
Galvanised iron canister, with galvanised iron tank lid, for winch wire cable, for Ocean depth sounding machine, used for marine vessel navigation, patented by Sir William Baron Kelvin Thomson, British, 1876 and made by James White, Glasgow, Scotland, 1876

Galvanised iron canister

1876
Accessories for MRA 1 tellurometer sets (master and remote), c. 1960.

Part of Tellurometer, 1957-1962

1957-1962