On the Magnet/II-31
The page and line references given in these notes are in all cases first to the Latin edition of 1600, and secondly to the English edition of 1900.
180 ^ Page 99, line 10. Page 99, line 11. Manifestum est.—In this, as in many other passages, Gilbert uses this expression in the sense that it is demonstrable rather than meaning that it is obvious: for the fact here described is one that is not at all self-evident, but one which would become plain when the experiment had been tried. For other instances of this use of manifestum see pages 144, line 20; 158, line 19; 162, line 10.