[198] PAGE 118, LINE 10. Page 118, line 8. _cuspis is aut lilium._--Gilbert uses _cuspis_ or _lilium_ always of the North-pointing end of the needle. Sir Thomas Browne speaks of "the lilly or northern point"; but he differs from Gilbert in saying "the _cuspis_ or Southern point" (_Pseudodoxia Epidemica_, 1650, p. 46). Only in one place (p. 101, line 5) does Gilbert speak of _cuspis meridionalis_. Everywhere else the south-pointing end is called the _crux_. [199] PAGE 118, LINE 15. Page 118, line 13. _nam æquè potens est._--Later observation showed this view to be incorrect. The horizontal component of the earth's magnetic field is not equally strong all over the globe, and the sluggishness of the needle's return to its position of rest is not due to the supporting pin becoming blunt with wear. The value of the horizontal component is zero at the north magnetic pole, and increases toward the magnetic equator. It is greatest near Singapore and in Borneo, being there more than twice as great as it is at London. (See Captain Creak in _Report of Voyage of H.M.S. Challenger, Physics and Chemistry_, vol. ii., part vi., 1889.) [200] PAGE 119, LINE 5. Page 119, line 2. _lapis._--Both Stettin editions read _lapidis._ [201] PAGE 119, LINES 9-11. Page 119, lines 7-9. The gist of the whole book is summarized in these lines. They furnish a cardinal example of that inductive reasoning which was practist by Gilbert, and of which Bacon subsequently posed as the apostle. Compare pages 41 and 211. [202] PAGE 120, LINE 8. Page 120, line 5. _dicturi sumus_.--Change of verticity is treated of in book iii., chap. x., pp. 137 to 140. [203] PAGE 125, LINE 24. Page 125, line 29. _appositam._--All editions give this word, though the sense requires _appositum._ [204] PAGE 128, LINE 9. Page 128, line 11. _non nimis longum._--The editions of 1628 and 1633 read (wrongly) _minus_ instead of _nimis_. [205] PAGE 130, LINE 12. Page 130, line 14. The word _hunc_ in the folio of 1600 is corrected in ink to _tunc_, and the Stettin editions both read _tunc_. [206] PAGE 132, LINE 9. Page 132, line 10. _minimus & nullius ponderis._--The editions of 1628 and 1633 both wrongly read _est_ for _&_. [207] PAGE 132, LINE 28. Page 133, line 1. _nutat._--The editions of 1628 and 1633 both wrongly read _mutat_. [208] PAGE 134, LINE 22. Page 134, line 25. _in rectâ sphærâ._--The meaning of the terms a _right_ or _direct sphere_, an _oblique sphere_ and a _parallel sphere_ are explained by Moxon on pages 29 to 31 of his book _A Tutor to Astronomy and Geography_ (Lond., 1686): "A _Direct Sphere_ hath both the _Poles_ of the _World_ in the Horizon ... It is called a _Direct Sphere_, because all the _Celestial_ Bodies, as _Sun_, _Moon_, and _Stars_, &c. By the _Diurnal_ Motion of the _Primum Mobile_, ascend directly Above, and descend directly Below the _Horizon_. They that Inhabit under the _Equator_ have the _Sphere_ thus posited."