The A B C of Compass Adjustment (1905) Armed trawler Barker's compasses were often supplied

Barker's compasses were often supplied to retailers without any maker's marks

was the Boussole militaire perfectionnée - Improved military compass

a patent which included details of a prismatic clinometer and compass with a metal ring-type dial similar to the one seen in the Bennison compass

and the foothills of the Royal Society Range

a compound of calcium sulphide

The A B C of Compass Adjustment (1905) Armed trawler Barker's compasses were often suppliedTHE ABC OF COMPASS ADJUSTMENT E. W. Owens GEORGE PHILIP & SON LTD, London, 1905 A WW1 era compass adjustment manual, originally owned by Lt Stanley Fielder, a Royal Naval Reserve gunnery officer. All aspects of maritime compass adjustment are examined in detail. The author states in the preface that his intention was to help the reader gain a better undertanding of 'the Magnetism of iron vessels and the Compensation of the Compass'. Subjects covered