Referee report by G. B. Airy on 'On the Present Amount of Westerly Magnetic Declination [Variation of the Compass] on the Coast of Great Britain, and Its Annual Changes' by Captain F. J. Evans
1872 Evans by Airy Royal Observatory, Greenwich, SE 1872 July 2 My dear Sir I have perused Captain Evans’ paper, and I return <s>t<\s> it to M. White. I have to report on it as follows. The paper is in fact a Magnetic Survey of the coasts of Britain, as regards Magnetic Declination only. In this limited sense, the paper is very complete, and, as accompanied with its map, is worthy to be accepted hereafter as a sufficiently accurate representation of the general state of Magnetic Declination about Britain in the year 1872. I will allude to the following specific points. 1. The Magnetic Instrument employed is the Admiralty Compass. This instrument is less sensitive than a suspended needle, for minute variations, but it is also less liable to constant error <s>[text?]<\s> lasting for a sensible time. I think that it was the best instrument for the purpose. 2. On the Instruments used for determining the Astronomical Professor Stokes Secretary of the Royal Society.
Referee report by G. B. Airy on 'On the Present Amount of Westerly Magnetic Declination [Variation of the Compass] on the Coast of Great Britain, and Its Annual Changes' by Captain F. J. Evans, 1872. From The Royal Society, RR/7/178