Ball recording sextant with brass and alloy frame and plastic handle in rectangular fitted wooden box with a leather strap, made by the Mergenthaler Linotype Company, Brooklyn, New York, USA, 1944. Consists of scale (0° to 90°), on reverse, with 1°’ divisions and micrometer (1’), day and night telescopes (236mm) and no filter shades. In use, the celestial body is viewed directly and instead of a plumb bob, a falling steel ball records the altitude on a screen, and is read off the scale and micrometer.
- Object Number:
- furnishing and equipment
- measuring device - instrument
- component - object
- instrument component
- Permanent collection
Cite this page
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
Download catalogue entry as json
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.