![](https://coimages.sciencemuseumgroup.org.uk/54/191/medium_thumbnail_1934_0651__0002_.jpg)
![Sand glass in four pillared wooden mount (Sand glass)](https://coimages.sciencemuseumgroup.org.uk/58/892/small_thumbnail_1991_0216__0001_.jpg)
![Single sand glass in four pillared wooden mount. 17 minutes](https://coimages.sciencemuseumgroup.org.uk/58/891/small_thumbnail_1991_0216.jpg)
Single sand glass in four pillared wooden mount. 17 minutes. Horne Type B. Second half of the 18th century. (B3247)
Single sand glass in four pillared wooden mount. 17 minutes.
A sand glass measures out a specific length of time. They were used at sea to time a ship’s ‘watch’, or to calculate the ship’s speed.
Details
- Category:
- Time Measurement
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- 1991-216
- Materials:
- wood (unidentified), glass and sand
- Measurements:
-
overall: 160 mm x 87 mm
- type:
- sand glass
- credit:
- On loan from the Wellcome Trust