Thesaurus Term/Concept: SOUNDING MACHINE

Identifier -48
Class MDA OBJECT TYPE
Status Candidate
Index? Yes
Scope Note Mechanical device for measuring water depth. Incorporates an air filled glass tube, open at the bottom, attached to piano wire wound on a drum. Invented by the British physicist Lord Kelvin (1824-1907). Based upon the principles of Boyle's Law.

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