Note 55 — AN UNIVERSAL DICTIONARY OF THE MARINE. (continued 10)

Mr. Robertson, librarian of the Royal Society, favoured the author with an inspection of several curious remarks concerning the history of modern navigation; in which it appears, that the most early discoveries with regard to the magnetical variation were made about the year 1570. Mr. Robert Norman, from a variety of observations made by him nearly at that time, ascertains it to have been 11° 15´ easterly, or one point of the compass.