0ftifcttricftp« 35 



the particulars above recitedfefpecially con* 

 cerning theintereft of the weather, &c. in 

 lL\c&T\C2\Pk*nomena.)But now I (hall add, 

 that,not onely there may happen fome va- 

 riations in the fuccefs of Trials made with 

 Ele#rtcal Bodies, but that it is not fo 

 certain as many think, whether fome par- 

 ticular Bodies be or be not Eledrical. For 

 the inquifitive Kircbcrus reckons Cryftall 

 among thofe Gems to whom Nature has 

 denyed the attractive power we are fpeak- 

 ing of i and yet 1 remember not, that, a- 

 mong all the trials 1 have made with na- 

 tive Cryftall, I have found any that was 

 deftitute of the power he refufes them. 

 Alfo a late moft learned Writer reciting 

 the Efe&ricks, reckon'd up by our indu- 

 bious Countryman Gilberhznd increafing 

 their number by fome obferved by him- 

 felf, (to which I (hall now add, befides 

 white Saphyrs, and white Englifh Ame- 

 thyftsj the almoft Diaphanous fpar of Lead 

 Ore)denies Ele&ricity to a couple of tran- 

 fparent Gems, the Cornelion and the Em- 

 rald. And I do the !e(s wonder he fhould 

 do foto the former* becaufe I have my felf 

 in vain tried to make any attradiion with 

 a piece of Cornelion fo large and fair, that 

 'twas kept for a rarity * and yet with di- 

 vers other fine Cornelions I have been ab ! e 

 to attra& fome light bodies very manifeft- 



