c 
386 = Theory of the Situation of the Magnetic Poles, 
firft method is not only the moft eafy, but on many accounts 
the moft preferable ; and for this purpofe the correét dips of 
the magnetic needle, taken at the following places, (regard 
alfo being had to determine their correé latitudes and lon- 
gitudes, particularly the former, except near the magnetic 
poles, where it is neceflary to corre&tly determine both,) will 
be found fufficient, namely, at the Falkland Iflands, Buenos 
Ayres, Oroonoque, Trinidad, Barbadoes, Saint Luke, Mar- 
tinique, Guadaloupe, Antigua, Saint Martin’s, Bermudas, the 
Atlantic Ocean, in or near the fame longitude up to and near 
the Ifle of Sables, at the Hland of Cape Breton, the fouth 
fide of the river Sat Lawrence in the longitude aforefaid ; 
then going round to the north-eaft fhore of the Labrador 
Coaft, and obferving thereon at Davis’s Inlet, and fo on up 
to the northward under the meridian aforefaid, up to and 
into Baffin’s Bay, and there carefully determining the lati- 
tude and longitude of the north magnetic pole ; or firft going 
into Baffin’s Bay, and afterwards proceeding to the fouth- 
ward. 
Next, by carefully obferving the nragnetic melination along 
the oppofite meridian in Ruffia, China, the Chinefe Seas, 
Indian Ocean, &c.; as at the mouth of the Leno, at Olikf- 
minfkoi, at Nutfchink or Albazin, at Pekin, Nankin, Nim- 
po, Formofa, the Philippine Ifles, Gindano, Celebes, Flores, 
the north and fouth fide of New Holland, and fo continuing 
to, obferve along the Indian Ocean, in or near the meridian 
aforefaid, up towards the fouth pole of the earth, until the 
place of the fouth magnetic pole be carefully determined, 
i. e. whatever pole may be firft convenient to determine, 
The number of places herein fet forth are mentioned in order 
ihat navigators and others, as opportunity may offer, may 
know where and how to make the advantageous obfervations 
herein alluded to. writ 
It may alfo be proper to add, that hitherto the places’ of 
the magnetic poles have always been attempted to be found 
by means of the magnetic variation ; a method whereby the 
moft able mathematicians have been continually led aftray, 
for, as the magnetic variation is continually changing, their 
conclufions 
