Computer Science
Scientific paper
May 1895
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1895natur..52..106w&link_type=abstract
Nature, Volume 52, Issue 1335, pp. 106 (1895).
Computer Science
Scientific paper
I HAVE been much interested with the letter of Dr. L. A. Bauer in your last number, as I happen to possess a map, or chart, bound up with a number of Dutch, German, and French maps of the end of the seventeenth and the first years of the eighteenth centuries. The latest map with a date is 1704. This English map is evidently the same as 974 (4) mentioned by Dr. Bauer. It is entitled ``A new and correct chart showing the Variations of the Compass in the Western and Southern Oceans, as observed in ye year 1700, by his Maties command by Edm. Halley.'' The dedication reads as follows, in Latin: ``Majestati semper Augustæ Gulielmi III. D.G. Magæ Britanniæ Fra. & Hib. Regis Invictissimi. Tabula hæc Hydrographica Variationum Magneticarum Index. Devotissime Consecratur a Subdito Humillimo Edm. Halley.'' At one side of the map is the following: ``The curve lines which are drawn over the seas in this chart do show at one view all the places where the variation of the compass is the same: The numbers to them show how many degrees the needle declines either Eastwards or Westwards from the true North : and the double line passing near Bermudas and the Cape de Virde isles, is that where the needle stands true without variation.''
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