SUNDIAL FOR POCKET DEVISED IN ENGLAND.
A waistcoat pocket sundial now being sold in Britain will tell the time within a few minutes at any place in the British Isles. It is contained in a small rectangular brass case. Inside the hinged lid is a list of the principal towns and cities, with their latitude, longitude, equation of time and variation of the compass. A folding stylus on the dial has three settings, for latitudes oldeg. 54deg and 57deg respect ivelv, and the time is read off one of three scales, which correspond with these latitudes. A compass needle, with a scale marked up to- 40deg each side of is provided below the sundial. the time, the stylus is set to the nearest latitude to the observer. The instrument is then held in a horizontal position. with the compass needle pointing to the compass variation, and the time is read off the dial that corresponds with the stylus setting. The difference between sun time and mean time is then added. Finally, four minutes for each degree west of Greenwich is added, or the same amount is subtracted 4or each degree -ast.
Permanent link to this item
https://paperspast.natlib.govt.nz/newspapers/TS19300104.2.36
Bibliographic details
Star (Christchurch), Issue 18959, 4 January 1930, Page 2
Word Count
191SUNDIAL FOR POCKET DEVISED IN ENGLAND. Star (Christchurch), Issue 18959, 4 January 1930, Page 2
Using This Item
Star Media Company Ltd is the copyright owner for the Star (Christchurch). You can reproduce in-copyright material from this newspaper for non-commercial use under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence (CC BY-NC-SA 4.0). This newspaper is not available for commercial use without the consent of Star Media. For advice on reproduction of out-of-copyright material from this newspaper, please refer to the Copyright guide.