Demainbray's model sea gauge

Made:
1701-1753
maker:
Stephen Hales

Model sea gauge, maker unknown, before 1754. Once belonged to Stephen Demainbray.

This is a device for measuring the depth of the sea. It once belonged to Stephen Demainbray and was used by him in his lecfures on natural philosophy. The inner vessel contained mercury with honey or treacle above it. A weight was attached to make the gauge sink and it was dropped overboard. When it hit the sea bed the catch released the weight so that the gauge floated back up again again. Since pressure increases with depth, so the depth could be calculated from the height of the treacle reached in the inner tube. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection.

On display

Science Museum: Science City

If you are visiting to see this object, please contact us in advance to make sure that it will be on display.

Details

Category:
King George III
Object Number:
1927-1398
Materials:
brass, complete, glass, glass (tube marked with black rings at regular intervals), not recorded and paper (fibre product)
type:
sea gauges
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • visual and verbal communication
credit:
King's College, London

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

View manifest in IIIF viewer

Add to Animal Crossing Art Generator

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.