C *«« 3 
nacle, and another to be brought into the Cabin, 
changing them alternately thus every Half Hour, and 
found by this Means I could make them traverfe 
as well as in any other Part of the World: I was 
obliged to continue this Practice, till we got near ioo 
Leagues from the Coaftj but afterwards I had no Oc- 
cafion for that Trouble. What fhould be the Caufe 
of this wonderful ‘Phenomenon , I am not able to con- 
jecture, being certain the Compafles, as to their me- 
chanical Structure, were very perfeft, and anfwer'd 
very well both before and after, during the whole 
Voyage 5 there is never any Oil ufed to make them 
move eafily, for in that Cafe it might often congeal, 
and flop the Motion of the Chard : But whether the 
Cold of the Climate hath a Power to deprive the 
Needle of its Virtue for a Time, or that thel?ri&ion 
is increas'd thereby to fuch a Degree, as it cannot be 
overcome by the Magnetifm, I am not able to fay 5 but 
theFad is certain and furprizing. April 20. 1738. 
IV. Extract of a Letter from Dr. Andrew 
Cantwell of Montpelier, to Dr. Thomas 
Stack, dated June 23. 1732. concerning 
an uncommon Ealfey of the Eye-l'id$. 
J UNE 7. 1732. Monf. GnilUminet , Counfellorof 
the Court of Aides, went hence to Balleruc , 
(whither I had been call'd to attend a Patient) with 
a Nun his Daughter, about 30 Years of Age. This 
Lady was troubled with as fmgular a Difeafe as I have 
heard of. Twas an intermitting periodical Palfey of 
R r 2 the 
