DECLINATION. 
and expenfive to ape er. 
The following table is as ecimen of the declination of 
in different parts‘of the world. It 
which contain the latitude and 
longitude of the place, the declination, and the year in 
which it was obferved. 
i i Y hi " 
oo as aor a oe ich 
ssid va were made. 
so r ° U fo} v7 
qo Ey 163 24 30 21 1779 
69 38 164 It 31. fe) 1778 
66 36 | 167 55 | 27 59 
65 43 | 170 34 27 58 
63 §8 165 48 25 25 
59 39 | 149 8 22 54 
58 14 | 139 19 24 40 
55 32 | 135 0 23 29 
53 37 | 134+ 53 20 32 
Welt. 
50 8 4 40° 20 36 17476 
48 44 5 o | 22 38 
40 41 If 10 a2 29 
33 45 14 50 18 4 
gt 8 | 15 30 | 37 43 
28 30 7 © If 0 
23° 54 18 20 Sf 4 
20 «30 20 3 T4 35 
19 45 20 39 13 It 
16 37 22 50 IO 33 
eid 75 23 36 9 15 
13 3% | 23 45 9 25 
12 21 230 64 9 48 
II 51 24° «5° 8 19 
8 55 22 §0 8 58 
6 29 | 20 5 | 9 44 
4 23 21 2 9 1 
3 45 22 34 8 24 
a ae 24 10 7 42 
114 | 26 2 | 5 35 
2 258 27 10 4 59 
oT 27,29 4 27 
South 
I 23 28 58 3 12 
2 48 | 29 37 2 52 
3 37 3° 14 2 14 
a 2s a 2 54 
5 © 3I 40° I . 
6 0 32 50 ° 
: Fatt. 
6 33 {e) oO 35 
i 23 Wett. 
7.50 34 20 o 7 
5 34 20 °o 15 
~ Eaft. 
I 4 50 Oo 44 
: : : Wet. 
Io 4 34 49 o 38 
Eaft. 
Iz 40 34 49 f 32 
- : + net Years in whic h | 
7 ee al oa the Obferatins 
: we ade. 
34 49 r 4 | 1776 
i te 34 49 I 9 
15 33 34. 40 I is 
16 12 35 20 2 4 
18 30 aq 50 3 2 
20 «8 36 I 5 26 
at 37 36 9 3 24h 
ah TF 36 «8 3 24 
26 47 | 34 27 3 44 
28 19 32 20 1 58 
30 25s a0. 26 2 37 
Weft. 
33 43 16 30 4 44 
5 a) 9 30 5 5 
38 23 «20 21.12 
Eaf, Eatt. 
40 36 | 173 34 13° 47 
42 4 169 32 13 17 
Welt. 
44 52 155 47 g 28 
46 15 | f44 50 14 48 | 
48 41 | 69 10 | 27 39 
he firft sal who paid Seared attention to the 
clination of the magnetic needle in differe parts of the 
world, was the celebrated Dr. Hs ieee ah in the year 
1685, undertook two voyages expreisly for ‘this purpofe. 
He collected, as far as it was in his power, all the obferva- 
tions made in different places relative to the declination of 
the magnetic needle, hae its variation. i 
render them ufeful to navigators in general, 
them on a chart, which he called the delination chart. 
thofe points or places in which the declination was the 
for inftance, he drew a a through all thofe places in one 
the declination was 5°; he drew another line through all 
thofe places in which che declination was 10°; and fo forth, 
But through the points in which there was no declination 
either eaftward or weftward, he drew a double line by way of 
diftinétion, which of courfe is called the line of no declination : 
{out ll the above-mentioned lines are called dechnation 
lines, or (from their firl Projet or) the ey ile 
aed d in the Abo 
chart was forme e year 1700 yea 
effrs nd ae ubl ithed a fimilar one 
of declinations, which were principally derived from obferv- 
made in the courfe of the years 1744 and 1756. 
r. Halley’s chart, the line of no declination croffes 
the peta of London at about the ssth degree of fouilt 
latitude; it then proceeds in an arched direction towards 
the weft of that meridian; and increafing its curvature as it 
advances up into the jai hemifphere, it terminates at 
Charles town cn the of North America. In Moun. 
taine and Dodfoa’ mies the ine of no. aa paffes 
e-meridian of 
- 
oth degree of north lati- 
tude. The lines of ea declination are on the concave — 
