TABLE OF THE VARIATIONS OF THE COMPASS.
r Date. La(.
S o u t h .
Long.
West.
Var.
East. Date. L a t .
South.
Long.
East.
Var.
West.
1 8 3 5 - 1 8 3 6 .
D e e . 6 2 1 5 1 1 6 6 3 7 1 0 2 7 ' M a y 1 5 2 7 3 3 4 0 6 2 2 1 1 0
• • 7 2 2 4 > 1 6 9 0 1 1 0 6 6 1 6 2 7 2 1 4 0 1 3 2 1 3 6
2 2 4 1 1 6 9 1 1 1 0 0 • 7 2 7 4 5 3 3 1 8 2 1 4 3
1 0 2 5 4 2 1 7 7 6 1 1 1 5 1 8 2 8 12 3 6 0 8 2 0 4 8
2 6 3 0 1 7 8 2 6 1 1 ' 5 2 3 3 4 4 5 2 3 1 1 2 6 2 2
1 1 2 7 2 6 1 7 9 2 0 1 1 2 2 3 4 5 3 2 2 3 3 2 8 5 9
2 8 4 5 • 1 7 9 2 7 1 1 5 4 J u n e 2 9 2 2 6 6 5 0 6 2 4 0 9
EAST. 3 0 2 2 1 7 4 3 6 2 4 1 2
. . 12 = 9 4 1 1 7 9 0 8 1 3 2 4 WEST.
2 9 4 1 1 7 9 0 8 1 3 1 6 J u l y 8 1 5 5 7 5 3 4 1 9 4 3
. . 14 3 1 2 5 1 7 5 5 9 1 4 > 5 - . 6 1 3 0 2 9 0 7 1 9 5 6
. . 15 3 2 3 6 1 7 5 0 5 1 4 1 4 1 8 9 5 2 1 2 3 4 1 7 4 3
. . 21 3 5 0 0 1 7 4 0 0 1 4 0 5 2 1 7 5 7 1 4 2 4 1 7 3 6
1 8 3 6 . 2 4 9 3 0 1 7 3 2 1 5 5 6
J a n . 1 3 4 0 4 1 - 2 5 6 1 3 0 5 2 5 1 0 07 l 8 6 8 1 6 5 7
4 3 4 4 0 1 6 5 3 7 1 3 2 6 2 6 1 1 2 5 2 3 2 3 1 3 0 6
• • 7 3 4 1 6 3 2 6 1 3 2 8 2 8 1 2 0 4 2 8 3 1 8 2 6
F e b . 21 4 2 5 3 1 4 1 4 5 8 2 1 .. 1 2 1 2 2 9 3 9 9 0 0
. . 22 4 2 4 8 1 4 0 4 0 7 3 7 3 ' 1 2 4 8 3 5 6 5 4 2 9
WEST. 1 2 4 9 3 6 6 2 4 0 7
M a r c h 2 3 9 4 6 1 2 3 4 2 3 3 5 A u g . " e i ' 3 0 9 3 8 3 0 2 4 4
3 3 8 2 0 1 2 3 3 6 2 5 0 7 1 2 4-( 3 7 > 6 4 3 1 8
3 7 5 2 1 2 3 1 3 3 4 8 8 1 2 3 2 3 7 3 9 3 1 1
3 7 5 4 1 2 3 1 1 3 0 2 9 1 2 4 4 3 7 2 9 2 4 6
5 3 6 2 7 1 1 9 5 0 5 2 4 1 2 4 0 3 7 0 0 4 1 6
• • 15 3 5 3 3 1 1 7 3 0 6 0 6 1 3 8 0 3 3 4 4 9 6 1 1
.. 16 3 5 3 8 1 1 7 0 9 8 1 5 1 5 8 0 3 3 4 6 0 5 0 9
3 5 3 4 1 1 6 1 6 6 3 1 KORTH.
. . 17 3 4 4 8 1 1 4 0 0 7 2 0 2 2 2 3 2 2 9 0 7 1 0 2 3
. . 21 2 7 2 8 1 0 8 5 0 4 6 9 2 3 3 3 9 2 9 11 1 0 2 7
= 7 2 7 1 0 8 4 7 5 1 9 2 4 5 4 5 2 7 1 1 1 4 2 6
• • 23 2 3 4 4 1 0 6 1 7 3 5 8 S e p t . 4 1 4 4 3 2 3 3 9 1 7 0 2
• • 25 2 0 2 4 1 0 4 0 9 3 2 2 9 2 3 4 3 3 3 6 ° 1 5 2 6
A p n l 13 1 2 2 i 9 4 0 4 0 0 4 2 3 3 9 3 3 4 7 1 6 1 3
• • 15 1 3 1 7 8 8 1 3 0 1 8 1 0 2 5 0 0 3 4 1 9 1 6 0 5
1 2 5 9 9 0 3 3 0 6 7 1 1 2 8 0 7 3 6 0 0 1 7 0 6
. . 21 1 6 5 6 7 3 0 2 3 5 5 1 2 2 8 2 9 3 6 1 8 1 6 2 5
1 6 5 6 7 3 0 1 3 3 8 1 3 2 9 5 9 3 6 2 3 1 7 5 4
. . 22 1 6 5 8 7 2 5 9 3 2 8 1 4 3 1 0 4 3 6 6 7 1 8 2 8
* . > 7 1 3 7 1 4 8 4 0 4 1 5 3 2 0 3 3 5 0 5 1 8 2 2
1 7 2 4 7 1 5 1 4 1 0 1 6 3 6 3 8 3 1 3 2 2 1 3 4
• • 23 1 7 3 S 7 0 2 7 5 0 7 1 7 3 7 1 5 2 8 6 4 2 2 " 9
. . 24 1 7 5 2 6 8 3 0 5 3 9 i 3 3 7 4 9 2 8 0 0 2 4 0 0
. . 26 1 8 3 5 6 3 3 4 7 3 6 1 9 3 8 3 5 2 7 0 8 2 6 2 1
. . 27 1 8 4 3 6 2 2 0 8 0 6 2 6 3 8 5 4 2 5 0 3 2 3 2 1
1 8 4 3 6 2 1 4 8 1 1 2 6 4 0 3 5 2 2 4 5 25 0 0
! ! 2 *8 1 9 2 0 6 0 1 2 a 5 9 4 1 2 8 2 1 3 1 2 5 38
M a y 13 2 5 4 6 4 2 1 6 1 6 2 7 4 2 0 6 2 0 0 6 2 6 0 0
. . 15 2 7 3 0 4 1 0 8 2 0 3 7 2 7 4 2 2 0 1 9 5 0 2 6 03
All the observations for variation, afloat, were taken with a very good Gilbert's compass,
placed on a stanchion above the poop, where it was found, by trials in various latitudes, to be nearly
free from any effect of local attraction.
A P P E N D I X .
ERRATUM in page 63, line 4, of figures,/or 0 15 rend 2 15-
No. 1.
S i r : March 19, 1831.
Accompanying this letter, I have the honour to transmit to you,
for their Lordships' information, six charts and sixteen plans of
harbours and portions of the coast of Tierra del Fuego, the results of
Commander Fitz-Roy's surveys iu H.M.'s sloop Beagle, between
April 1829 and June 1830.
Their Lordships wiU, I trust, permit me, as the senior officer
of that expedition, to state the pecuhar nature and extent of this
service, as well as the complete manner in which it has been
effected.
On the melancholy occasion of Commander Stokes's death, I was
fortunate, through the Commander-in-chief Sir Robert Otway's just
discrimination of Commander Fitz-Roy's qualifications, on account of
which alone he was selected, to receive him as my colleague, in the
command of the Beagle.
In April I detached the Beagle, and Adventure's tender, to complete
portions of the Strait of Magalhaens that were then imperfect; and by
him, and! under his superintendence and able direction, the Magdalen
and Barbara Channels through the Tierra del Fuego were
surveyed; a considerable portion of the interior sounds on the
western coast was examined; and the discovery of the Otway and
Skyring Waters was made, by Commander Fitz-Roy himself, in the
depth of the severe winter of that climate, and on which he was
absent from the ship thirty-three days in an open whale-boat._
In August the Beagle joined me at Chiloe, and sailed again early
in November following, with a ™w to examine the outward or sean
? - I HI