"Another piece of Curiosity I saw in the Hands of Sir _William Persal_ (since Deceased also) _viz._, a _Terrella_ or _Load-stone_, of little more than _6 Inches Diameter_, turned into a _Globular Form_, and all the _Imaginery Lines_ of our _Terrestrial Globe_, exactly drawn upon it: _viz._ the _Artick _ and _Antartick Circles_, the _two Tropicks_, the _two Colures_, the _Zodiack_ and _Meridian_; and these _Lines_, and the several _Countryes_, artificially _Painted_ on it, and all of them with their true _Distances_, from the two _Polar Points_, and to find the truth of those _Points_, he took two _little pieces_ of a _Needle_, each of about _half_ {24} _an Inch in length_, and those he laid on the _Meridian line_, and then with _Brass Compasses_, moved one of them towards the _Artick_, which as it was moved, still raised it self at one end higher and higher, keeping the other end fixt to the _Terrella_; and when it had compleated it Journy to the very _Artick Points_, it stood upright upon that _Point_; then he moved the other piece of _Needle_ to the _Antartick Point_, which had its _Elevations_ like the other, and when it came to the _Point_, it fixt it self upon that _Point_, and stood _upright_, and then taking the _Terrella_ in my Hand, I could perfectly see that the two _pieces_ of _Needles_ stood so exactly one against the other, as if it had been one intire _long Needle_ put through the _Terrella_, which made me give credit to those who held, That there is an _Astral Influence_ that _darts_ it self through the _Globe_ of _Earth_ from _North_ to _South_ (and is as the _Axel-Tree_ to the _Wheel_, and so called the _Axis_ of the _World_) about which the _Globe_ of the _Earth_ is turned, by an _Astral Power_, so as what I thought _imaginary_, by this _Demonstration_, I found _real_." [63] PAGE 13, LINE 20. Page 13, line 22. The editions of 1628 and 1633 give a different woodcut from this: they show the terrella lined with meridians, equator, and parallels of latitude: and they give the compass needle, at the top, _pointing in the wrong direction_. [64] PAGE 14, LINE 3. Page 14, line 3. The Berlin "facsimile" reprint omits the asterisk here. [65] PAGE 14, LINE 5. Page 14, line 6. _erectus_ altered in ink in the folio to _erecta_. But _erectus_ is preserved in editions 1628 and 1633. In Cap. IIII., on p. 14, both these Stettin editions insert an additional cut representing the terrella A placed in a tub or vessel B floating on water. [66] PAGE 14, LINE 34. Page 14, line 39. _variatione quad[=a]._ The whole of Book IIII. is devoted to a discussion of the variation of the compass. [67] PAGE 16, LINE 28. Page 16, line 34. _aquæ._--This curious use of the dative occurs also on p. 222, line 8. [68] PAGE 17, LINE 1. Page 17, line 1. _videbis._--The reading _vibebis_ of the 1633 edition is an error.