ly, if not briskly > and I ufually wear a 

 Cornelian Ring, that is richly enough en- 

 dowed with Ele&ricity. But as for Em- 

 ralds, as I thought it ftrange that Nature 

 fhould have denied them a Quality flic 

 has granted to Co many other Diaphanous 

 Gems, and even to Cryftal, fo I thought 

 the affertion deferved an Examtn> upon 

 which I concluded, that at leaft it does 

 not univerfally and conftantly hold true. 

 I had indeed feen in a Ring a Stone of 

 price and great luftre , which, though 

 green, I found to be, (as I guefs'd it would 

 prove) vigoroufly enough Eledfrrical. But 

 this Experiment, though fcemingly con- 

 clusive, I did not look upon as a fair trial, 

 becaufe the Stone was not a true Emrald, 

 but, which is rare, a green Saphir. And 

 I learned by inquiry of the skillful Jewel- 

 ler that cut it, that it was fo far from ha- 

 ving the foftnefs of an Emrald, that he 

 found it harder than blew Saphyrs them* 

 felves, which yet are Gems of great hard- 

 nefs, and byfome reputed fecond to none, 

 but Diamonds, Without therefore con- 

 cluding any thing from this Experiment, 

 fave that, if the affertion I was to cxamin 

 were true, the want of an Ele&rical fa- 

 culty might be thought a Concomitant ra- 

 ther of the peculiar Texture of the Em- 

 rald than of its green colour, I proceeded 



to 



