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. |