-BAUER. 197 



the same track followed by Halle^^'s ship. Since then this vessel, 

 the Caniegie^ has circumnavigated the globe and has repeatedly 

 intersected the course of the Paramour Pink in the Atlantic Ocean. 



In view of the historic interest thus attaching to Halley's magnetic 

 expedition, it will be well worth our while to use this as our starting 

 point or center, the tifth point in the Chinese compass. The instruc- 

 tions given Halley, as far as they pertained to his observationa.l work, 

 were as follows: 



Whereas his Majesty has been pleased to lend his Pink the Paramour for 

 your proceeding with hei on an expedition to improve the linowledge of the 

 Longitude and variations of the Compasse, which shipp is now completely 

 Man'd, Stored, and Victualled, at his Majesty's charge for the said Expedition ; 

 you are therefore hereby required and directed to proceed with her according 

 to the following instructions : — 



You are to make the best of your way to the southward of the Equator, and 

 there to observe on the East Coast of South America, and the West Coast of 

 Africa, the variations of the Compasse with all the accuracy you can, as also 

 the true situation both of Longitude and Latitude of the Ports where you 

 arrive. 



You are likewise to make the like observations at as many of the Islands in 

 the seas between the afoi-esaid Coasts as you can (without too much deviation) 

 bring into your Course; and, if the season of the year permit, you are to stand 

 soe farr into the South till you discover the Coast of the Terra Incognita, sup- 

 posed to lie between Mongolan's Straits and the Cape of Good Hope, which 

 Coast you carefully lay down in its true position. In your return home you 

 are to visit the English West India Plantations or as many of them as con- 

 veniently you may, and in them make snch observations as may contribute to 

 lay them down truely in their Geographical! Situation. And in all the Course 

 of your voyage you must be caref ull to omit no opportunity of noting the varia- 

 tion of the Compasse. of which you are to keeji a Register in your Journal. 



Curiously enough, Halley, though a prominent member of the 

 Royal Society, never contributed a paper to it, nor did he publish 

 anything elsewdiere on these voyages of his, his observations, or 

 resulting conclusions. Not until 1775 were Halley's journal and 

 observations published, and then by Alexander Dalrymple in his 

 " Collection of Voyages chiefly in the Southern Atlantick Ocean," 

 from the manuscript in the possession of the Board of Longitude at 

 London. Halley appears to have contented himself with laying down 

 the results of his work on a chart entitled "A new and correct Sea 

 Chart of the Whole World, showing the Variations of the Compass 

 as they are found in the year 1700.'' This chart is often briefly re- 

 ferred to under the title " Tabula Nautica." The first edition, pub- 

 lished probably in 1701, covered only the ocean — the Atlantic — 

 traversed by Halley himself; for the later edition, as the chart was 

 now to cover the greater part of the globe, he had to collect and 

 utilize observations made by others. No printed reference to the 

 early edition, either by Halley or by anyone else, prior to my dis- 



