Chap, a r. exf Tre.itife of BODIES. 



We faid before) by lying a long time unduly difpofcd, either to- 

 wards the earth, or towards a ftrongcr load/tone; whereby in 

 ftead of the former, it gaineth a new virtue according to thatfi- 

 tuation. 



And this happeneth, not onely in the virtue which is refident 

 and permanent in a loadftone, or a touched iron;but likewife in 

 the a&uall motion or operation of them. As may be experienced, 

 firft in this, that the fame loadftone or touched iron in the fouth 

 hemifphere ofthe world, hath its operation ftrongeft at that end 

 of it which tendeth to the north; and in the north hemifphere at 

 the end which tendeth to the fouch: each pole communicating a 

 vigour proportionable to its own ftrength in the climate where 

 it is received. Secondly in this > that an iron j'oyncd to a load- 

 ftone, or within the fphere ofthe loadftones working, will take 

 up another piece of iron greater then the loadftone of it felfcan 

 hold; and as Coon as the holding iron is removed out of the 

 fphere ofthe loadftones activity, it prefently letteth fall the iron 

 it formerly held up rand this is fo true,that a JefTcr loadftone may 

 be placed in fueh fort within the fphere of a greater loadftones 

 operation, as to take away a piece of iron from the greater load- 

 ftonc;& this in virtue of the fame greater loadftone from which 

 it plucketh it: for,but to remove the lefler out ofthe fphere ofthe 

 greater, and then it can no longer do it. So that it is evident that 

 in thefe cafes the very aftuall operation ofthe lefler loadftono 

 . or ofthe iron; proceedeth from theactuall influence of the grea- 

 ter loadftone upon and into them. And hence wcmayunder- 

 ftand, that whcnfoever a magnetick body doth work, ic hath an 

 excitation from without, which doth make it ifTue out and fend 

 its ftrcams abroad; in fuch Ibrt as it is the nature of all bodies 

 to do; and as we have given examples ofthe like done by heat, 

 \vhen we difcourfed of Rarefaflion. 



But to explicate this point more clearly by cntring more par- 

 ticularly into it; if a magnetick body liech north and fouth, it is 

 cafie & obvious to conceive that the ftreams coming from north 

 and fouth ofthe world,and pafling through the ftone muft needs 

 excitate the virtue which is in it, and carry a ftream of it along 

 With them that way they go. But if it licth eaft and weft, then 

 the fleams of north & fouth of the earth, ftrearning along by the 

 two poles ofthe ftone,are fucked in by them much more weakly: 



yet- 



