Black glass artificial horizon
An artificial horizon was designed to be used with a sextant in situations where a natural horizon was not visible; for instance, when the sextant was being used on land.
A circular brass case on three levelling feet covered with a blackened glass plate serving as mirror. The artificial horizon is contained in a fitted triangular sharkskin case containing a spirit level in a cylindrical wooden container. There is also a trade label for John Lilley and Son, 9 London Street and Fenchurch Street, London (1870-85), and a handwritten label, ‘E. Comp. 5th Batt. Essex Regt. Hon. Members 2nd Prize won by E.T. Adams. 1909’.
A circular brass case on three levelling feet covered with a blackened glass plate serving as mirror. The artificial horizon is contained in a fitted triangular sharkskin case containing a spirit level in a cylindrical wooden container. There is also a trade label for John Lilley and Son, 9 London Street and Fenchurch Street, London (1870-85), and a handwritten label, ‘E. Comp. 5th Batt. Essex Regt. Hon. Members 2nd Prize won by E.T. Adams. 1909’.
For more information about using images from our Collection, please contact RMG Images.
Object Details
ID: | NAV0015 |
---|---|
Collection: | Astronomical and navigational instruments |
Type: | Artificial glass horizon |
Display location: | Not on display |
Creator: | Troughton & Simms |
Date made: | circa 1830 |
People: | John Lilley & Son Ltd |
Credit: | National Maritime Museum, Greenwich, London, Adams Collection |
Measurements: | Overall: 55 x 130 x 120 mm; Diameter: 90 mm |
Parts: | Black glass artificial horizon |
Your Request
If an item is shown as “offsite”, please allow eight days for your order to be processed. For further information, please contact Archive staff:
Email: library@rmg.co.uk
Tel: +44 (0)20 8312 6516 (during Library opening hours)
Click “Continue” below to continue processing your order with the Library team.