IN CH R YSOLITIIO. 355 



elus , qiiac iii tabiilii adic(fla exhibctur ) elcgi , et 

 rcpctitis cxpcrimcutis inucui , ipllim cius cfle uiUu- 

 ruo , \t caluris ope extrcinum AB uegatiunm , cx- 

 trcmum vcro CD pofitiuam ndipifcntur clccflricita- 

 tcm. H;uic cryUallum in mcdio circitcr it:i diffrc- 

 gi , vt fradunie planum , ad ilrias crydalli cfrcC 

 norm;ilc , et \truniquc frullrum nouo fubicci cxa- 

 mini , tuquc mirabr.ndus iiuicni. 



i) In frudo ABEF circa AB adluic nc- 

 gatiunm , circa EF vtro pofitiuam clclricitatcm ob- 

 tincre 



2) in nltcro rruftro , circa GH ncgatiuam , 

 circa CD pofitiiiam eleftricitatem locnm habcre. 



Nonnc fumiTie rniranda eft , haec in cryflalli 

 noftrae ct magnetis indolc fimilitudo ? Contingcre 

 enim prorfus cadcm in magnctc diffrado , -vt Jurtes 

 in lapide huegro contigiiae , in (tUJyatto contrarias pof- 

 fideant ^-irtutes . tam nota rcs cH , \t indicio meo 

 non inJigtat 



Y y 2 DK 



