Capt. Halley V Scheme of the Variat. lo i 
was much pleas’d to fee it thus Obfcrv’d in An.i6g^. 
a Scheme fhcwn me after my Return home, 
wherein are reprefented the fevera! Vari- 
ations in the Atlmtick Sea, on both fides 
the Equator ; and there, the Line of no 
Variation in that Sea is not a Meridian 
Line, but goes very oblique , as do thofe 
alfo which fhew the Increafe of Vaiiation 
on each fide of it. In that Draught there 
is fo large an Advance made as well to- 
wards the Accounting for thofe feemingly 
Irregular .Increafes and Decreafes of Vari* 
I . ation towards tlte S. E. Coafl: of America, 
as towards the fixing a general Scheme or 
Syfiem of the Variation every where, 
which would be of fuch great Ufe in Na- 
vigation, that I cannot but hope that the 
Ingenious Author , Capt. HaHey, wb.o to 
his profound Skill in all Theories of rhefe 
kinds, hath added and is adding continu- 
ally Perfonal Experiments, will e’er long 
oblige the World with a fuller Difcovery 
ottheCourfe of the Variation, which hath 
hitherto been a Secret. For my part I pro- 
fefs my felf unqualified for offering, at any 
thing of a Geperal Scheme ; hut fince 
Matter of Faff , and whatever increafes 
the Hiftory of the Variation, may be of 
ufe tovv^ards the fetling or confirming the 
Theory of it , I fhall here once for ail in- 
fer t a 7 able of all tlxaVarutions I obfervTl 
beyond the Equator in this Voyage, bjih 
^1 1 
