Thesaurus Term/Concept: SAND GLASS
| Identifier | 95341 |
|---|---|
| Class | MDA OBJECT TYPE |
| Status | Preferred |
| Index? | Yes |
| Scope Note | A reversible device for measuring time by the transfer of sand from upper to lower glass bulb. |
| Identifier | 95341 |
|---|---|
| Class | MDA OBJECT TYPE |
| Status | Preferred |
| Index? | Yes |
| Scope Note | A reversible device for measuring time by the transfer of sand from upper to lower glass bulb. |