C 20^1 ) 
derable Ipeciilations and refearches may arife from fuch Obfer* 
vations* As for me, I am almoft of the opinion, that this Mag- 
netical Diverfity comes from the Motion of the Earth. Doubt- 
' left, as there is a certain Libration in the Moon, fo 'tis not abfiird 
to me, to hold a kind of Libration in the Earth, from the Annual 
and Diurnal motion of the fame. For that the caufe of this De- 
clination and Variation of the Load-ftone is inherent in the 
Stone it felf, or to be afcribed to ^Ethereal Corpufcles^ is not ima^ 
ginable by me 5 nor can I yet devife any caufe of thofe Appear- 
ances, except we impute them to the Globe of the Earthjand the 
v Variation of the Meridian* But this fubtile Queftioo I leave to 
■ deeper Wits to difculTe. What you in England have lately per- 
formed in this matter, I ftiould be very glad to be informed of> 
I (hall conclude with acquainting you , that I lately received 
from one, that liveth on the fide of the S^/Z/V^Sea, a piece of 
Amber ^ which is fo foft, that I printed my Seal on it. It is yellow 
ifli, as moft Amber is 5 tranfparent, and burning as other Amber ^ 
but its fcent ftronger, as if it were a kind of glutinous Bitumen ^ 
and yet it hathl)een caft up from the Sea this year, and was found 
among other pieces* His Brother, a very credible perfon , rela- 
> ted at the fame time, that he had been m'after of a fmall piece of 
^ Amber, foft on one fide, and very hard on the other, wherein lay 
buried a Fly. 
r A Letter of Mr. Jofeph Childrey to the Right Reverend Seth 
r Lord BiJIoop of Sarum, containingfome Animaverjions upon the 
Revereiftd Dr. John Wallis*/ Hypothefts about the t lux and Re- 
flux of the Sea, publifift N\ 1 6. of thefe TraSs, . 
MY Lord, The laft Summer I acquainted your Lord£hip,that 
I had in my mind animadverted fomethings upon Dr. 
Walliis Hypothefis concerning the Flux and Reflux of the Sea 5 
' which I have at length gotten time to put in writing , and here 
^refont them inclofed to your Lordfhip» If upon perufal of them, 
"you (hall think them worth tranfmitting to Dx.WaUis^ or com- 
imunicatingthem tothe K, Society ^ I only defire your Lordftiips 
and Their ifavourable cenfure of my judgment and reafons. 
* A a 2 7he 
