(5oj ). 
eeniidered the -force, and number of the mmy ' Argu- 
ments which concurr to make good, fonew and. U> bold .a 
Supposition, 
Though it be fufficientiy known and allowed that 
the Needles Variation changes, it will be neceffary how- 
ever to give a few inftances, whereby it may appear 
that this change is gradual and univerlal, and the effeft 
of a great and permanent motion. For which take the 
following Examples. . 
At Lmdov in the year 1580. the Variation was ob- 
ferved by Mr. Burrows to be n°. 15' Eaft In Anno 
1627. the fame was found by Mr. Gunter to be but 
6°. o v 4Saft. In the year 1634. Mr. GcMfaand found it 
4 0 . 5 Eaft. In 1657. Mr. Bond obferved that there was 
no Variation at London. Anno 1 672. my felf obferyed • 
it z°. to the Weft ; and this prefent year i-dp&'f 
again found it 6°. oo ; Weft, So that in \ \% years the 
dire&ion of the Needle has changed no lefs than 17 de- 
grees. 
At Paris. Orontm Finms about the year 15 jo. did 
accout it about 8 or 9 degrees Eaft Variation. Anno % 640. 
it was found 3 degrees Eaft. Anno 166$, there was no 
Variation there, apd Anno 1681. I found it to be z°. 30' 
to the Weft. 
At Cap d' Agulhas, the moft foutherly Promontory of 
Africa, about the year 1600. the Needle pointed due 
North and South without Variation, whence the Porta- 
gueze gave it its name. Anno 1 6zz. there was 2 degrees 
Weft Variation, Anno 1 675-. it was 8°. 00 Weft ; and 
this year 1 69 1. it was curioufly obferved not icis than 
1 1 degrees Weft. 
At St. Helena^ about the year 1600. the Needle de- 
clined 8 degrees to the Eaft. Anno i6z%. it was but 
6°. co' Eaft. Anno 1 67 7. when I was there, I obferved 
it accurately on ftiore to be od. 40' Eaft ; and now this 
year k was found about 1 d, to the the Weft ward of the 
North. Q z At 
