C 35« 1 
the gift of their Royal founder King Charles the Second, 
ihould be examined, to fee if there be any (enfible altera- 
tion in the Poles thereof ; And upon tryal it was found 
that the Points which are marked thereon with crolTes, 
were as near as could be difcerned the true Poles of the 
Stone; notwithftanding that the Variation has changed 
at London full 4 Degrees fincethis TerrelU has been in the 
Societies Cuftody ; and perhaps many more fince it was 
marked ; and had there been a change in the Poles of the 
Load-ftone analogous thereto, it muft needs have been 
perceived in this, whofe Diameter is about 4 | Inches. 
However to put this matter paft difpute, care v/as takeii 
to find out exaftly and mark the Poles of the Societys 
great Load-ftone, the Sphere of whofe Activity is above 
9 Foot Radius, and whole Poles are 13 Inches afunder^, 
whereby if this Tranflation of the Poles be real, it cannoc 
fail of being made very ienfibic in future times. As to 
die fuppofition that the Points in which the Iron hath re- 
ceived the Magnetical Vertue may change place,after the 
iame manner as the Poles of the Earths Magnetifme are 
obferved to do ; tho' it was lookt upon as an ingenious 
hint and worth profecuticn, yet fome of the Company^, 
well skiird in Magneticks were of opinion, rather that 
fuch a Circular Needle would librate on its Center, fb as 
to refpeft the Magnetical Meridian with the Points that 
had at firft received the touch, thanthatthe Ring remain- 
ing immoveable, the direftive Vertue fhould be transfer- 
red therein from place to place, either by length of time, 
or by tranfporting this Compafs into thole parts where 
the Variation o\ the Needle is confideraj^ly different. 
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