Magnetic Compass Deviation and Correction 515 Australia - North Coast -

Australia - North Coast - Northern Territory - Darwin to Penguin Shoal (Eastern Sheet) 1:300 000

both letters and numerals

Tikopia Island 1:50 000

Carnarvon National Park map

Moby Dick tells the story of Ishmael

Magnetic Compass Deviation and Correction 515 Australia - North Coast -In addition to dealing with the properties of magnets and the earths magnetism, three chapters are devoted to the magnetism of the ship, the third explaining in detail the reason for, and composition of, the nine rods. The relation of the components P, Q and R are the rods to the various co efficient are fully explained. The principle of the deflator and a discussion of the limits of accuracy are also included, together with a great deal of hitherto