BAIN (William). An Essay on the Variation of the Compass, shewing how far it is influenced by a change in the direction of the ship's head, with an exposition of the dangers arising to navigators from not allowing for this change of variation. Interspersed with Practical, Observations and Remarks. By William Bain, Master, Royal Navy.1817

Edinburgh: Printed for William Blackwood, Prince's Street; and John Murray, Bookseller of the Admiralty and Board of Longitude, Albemarle Street, London, First Edition, with the signature "D. Milne" on the upper blank margin of the title, folding chart "Exhibiting the Variation of the Compass agreeable to the position of the Ships Head at the time of Observation." "Also the track of His Majestys Ships Sybille & Princess Carolina in a Cruize to East Greenland in 1814.", [6], 140, pp., contemporary half calf, with the book plate of Sir A. Berkeley Milne Bart, a nice copy. ADVERTISEMENT. My chief object in publishing the following Essay, has been to call the attention of Nautical Men to the consideration of the change in the variation of the compass, caused by a change in the position of the ship's head. The non-attendance to this change in the variation has, I am fully convinced, occasioned much loss, and many fatal accidents: and if this Work shall in any way be instrumental in putting Navigators on their guard against such misfortunes in future, it will have completely attained its object.