230 A Trftiife o/BODIES. Chapi 21. 



of atonies in which it is involved, followeth the courfe of the 

 fteam: in fuch fort as the example we have heretofore upon an- 

 other occafion given of an eggs-fhcll filled with dew j the fun- 

 beams converting the dew inco fmoke,and raifing up that fmokc 

 or fteam, the eggs-fheli is likewife raifed up for company with 

 the fteam that iflueth from it. 



And for the fame reafon it is,that theloadftone draweth iron: 

 for iron being of a nature apt to receive and harbour the Reams 

 of a loadftone; it becometh a weak loadftone, and worketh to- 

 wards a loadftone,in fuch fort as a weaker loadftone would do: 

 and fo moveth towards a loadftone by the means we have now 

 defcribed. And that this conformity between iron and the load- 

 ftone is the true reafon of the loadftones drawing of iron, is 

 clear out of this, that a loadftone will take up a greater weight 

 of pure iron, then it will of impure or droffic iron ; or of iron 

 and fome other metall j'oyncd together : and that it will draw 

 further through a (lender long iron, then in the free open aire: 

 all which are manifeft figncs, that iron cooperateth with the 

 force which the loadftone grafteth in it. And the reafon why 

 iron cometh to a loadftone more efficacioufly then another load- 

 ftone doth, is becaufc loadftones generally are more impure then 

 iron is (as being a kind of ore or mine of iron) and have other 

 extraneous and heterogencall natures mixed with themrwhereas 

 iron recciveth the loadftones operation in its whole fubftance. 



CHAP. XXI. 



Portions drawn out of the ftrnier doftrint, **d confirmed 

 by cxperttMCHtall proofs. 



I, *He firft pofition is, that the working of the loadftone, be- 



JL ing throughout according to the tenour of the operation of 

 bodies, may be done by bodies^nd eonfeqacmly is not done by 

 occu ^ or f ccrcc qualities. Which is evident out of this, that a 

 greater loadftone hath more effect then a Jefler: and that if you 

 cut away part of a loadftone, part of his vcrtue is likewife ta- 

 ken from him: and if the parts be joyned again, the whole bc- 

 corneth as ftrong as it was before. 



Again ; if a loadftone touch a longer iron, it giveth it Me 

 force then if it touch afliortcr iron: nay, the vcrtne in any part 



is 



