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Title: Curves of equal magnetic variation, 1871/....by Staff Captain F J Evans FRS and Navigating Lieutenant E W Creak Royal Navy. [Go to resource]
Description: Scale: circa 1:50 m. 3 insets Insets: South Polar chart; Approximate annual change of the magnetic variation for the Epoch 1871 in muinutes of arc; North Polar chart Publisher: "http://collections.rmg.co.uk/" Source: Royal Museums Greenwich Identifier: http://collections.rmg.co.uk/collections... Go to resource More Like this...
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