In Kircher's _Magnes_ (Colon. Agripp., 1643, p. 434) is a table of the names of the thirty-two winds in six languages, where _Borrolybicus_ is given as the equivalent of _Maestro_ or _North-West_. [223] PAGE 161, LINE 2. Page 161, line 2. _Insula in Oceano variationem non mutat._--The conclusions derived from the magnetic explorations of the Challenger expedition, 1873-1876, are briefly these: That in islands north of the magnetic equator there is a tendency to produce a local perturbation, attracting the north-seeking end of the needle downwards, and horizontally towards the higher parts of the land; while south of the magnetic equator, the opposite effects are observed. (See _Challenger Reports, Physics and Chemistry_, vol. ii., part vi., _Report on the Magnetical Results_ by Staff-Commander Creak, F.R.S.) [224] PAGE 162, LINE 2. Page 162, line 3. _quarè & respectiuum punctum ... excogitauit._--The passage referred to is in _The newe Attractiue_ of Robert Norman (Lond., 1581), chap. vi. "Your reason towards the earth carrieth some probabilitie, but I prove that there be no _Attractive_, or drawing propertie in neyther of these two partes, then is the _Attractive_ poynt lost, and falsly called the poynt _Attractive_, as shall be proved. But because there is a certayne point that the Needle alwayes respecteth or sheweth, being voide and without any _Attractive_ propertie: in my judgment this poynt ought rather to bee called the point Respective ... This Poynt _Respective_, is a certayne poynt, which the touched Needle doth alwayes _Respect_ or shew ..." [225] PAGE 165, LINE 2. Page 165, line 2. _De pyxidis nauticæ vsitatæ compositione._--Gilbert's description of the usual construction of the mariner's compass should be compared with those given by Levinus Lemnius in _The Secret Miracles of Nature_ (London, 1658); by Lipenius in _Navigatio Salomonis Ophiritica_ (Witteb., 1660, p. 333); and with that given in Barlowe's _Navigators Supply_ (London, 1597). See also Robert Dudley's _Dell' Arcano del Mare_ (Firenze, 1646). [226] PAGE 165 deals with the construction; the process of magnetizing by the loadstone had already been discussed in pp. 147 to 149. It is interesting to see that already the magnetized part attached below the compass-card was being specialized in form, being made either of two pieces bent to meet at their ends, or of a single oval piece with elongated ends. The marking of the compass-card is particularly described. It was divided into thirty-two points or "winds," precisely as the earlier "wind-rose" of the geographers, distinguisht by certain marks, and by a lily--or fleur-de-lys--indicating the North. Stevin in the _Havenfinding Art_ (London, 1599), from which work the passage on p. 167 is quoted, speaking on p. 20 of "the Instrument which we call the Sea-directorie, some the nautical box, ... or the sea compasse," mentions the "Floure de luce" marking the North.