sand a Method of difcovering the Longitude. 307. 
éf the Admiralty, in order to procure their Lordfhips order 
to haye'the merits and efficacy of my inventions and inftru- 
ments officially examined into and reported upon. As to the 
inftruments, they were on the fame day applied for, throug: 
Commiffioner Marfh, to the Navy Office, by the above gen- 
tlemen. 
' The moft fpeedy and leaft expenfive method of afcertaining 
the précife fituation of the north magnetic pole, the fouthern 
being oppofite thereto, appears to Be, by engaging one of the 
Davis’s Strait whalers to proceed into Baflin’s Bay, with e 
proper perfon duly qualified, to make the ‘neceffary aftrono- 
mical and magnetic obfervations ; or rather,. by difpatching 
for this purpofe a frigate or other veffel in the king’s fervice 
¢«mployed on the Newfoundland ‘ftation. Pity it was, indeed, 
that the Board cf Longitude had not Known of this methed, 
and of the reafons that render all navigation into the South 
Sea, by any paflage to the eaftward of Greenland, totally im- 
practicable.’ The Hon. Captain Phipps’s deftination would 
in that cafe -have been to proceed into Baffin’s Bay, where, 
had he alfo pofleffed the angular and magnetic inftruments 
herein alluded to, he would have affuredly afcertamed one 
great object of his voyage, namely, the detérmining the fal- 
lacy or utility of all previous theories, and bringing them to 
the teft of experiment; a te(t which would have caufed the 
whole to have vanifhed,-and none other would have remained 
but that I. have already pointed out. Nor do fF entertain 
much doubt that, by attending to circumftances, which 
might eafily be pointed out, Captain Phipps would have alfa 
accomplifhed a paflage into the South Sea. 
The principles of the whole of my nautical magnetic in- 
ftruments (except a variation frame for converting ali fteering 
into variation compaffes) is the application of a quadrant, 
fextant, or double fextant, (fitted for this purpofe,) to the ver= 
tical magnetic axis of the horizontal needle for determining 
the variation, and to the lateral mag-etic inclinatory axis of 
the dipping needle for determining,the dip. Thefe needles 
are alfo differently fufpended from others: the dipping nee- 
dle, for example, is always at liberty to refort.to, and remain, 
eyo'ls ON al 
