378 
OBSERVATIONS ON THE MAGNETIC DIP AND DECLINATION. 
B 
LIV. Observations of the dip of the magnetic needle, made in the plane of the magnetic meridian, and also in various azimuths, at 
every 15° from 0° to 90°, and from 270° to 360°; with Major Graham’ s dip instrument, by Gambey of Paris. 
At the astronomical station on Lake Memphremagog, in Stanstead, Canada East. Latitude 45° 00’ 29”.2, N.; Longitude 4, 48m. 50s. W. 
Osserver.—Licutenant A. W. peg i ple, a States re of Ager Engineers. 
3 
ee. 2 3 4 5 7 10 11 12 13 I4 
Magnetic ei} _— OF | -eiip: ay 
azimuth of Polarity) computed jreduced to| No. 
: plane of dip-| No. of |Dip observed over ob- | planeof |. of 
Approximate circle, read-| of |Marked| in azimuth Dip in Computed |served dip the obser-|Thermo- 
Date. |mean solar time of ing of Nee-| end of by each azimuth by dip in in various| magnetic | va- | meter, | Barom- Remarks, 
observation, verniers. | dle, Needie,| needle, observation. | azimuth. | azimuths.| meridian. |tions,| (Fab.) | eter. 
indice sethininad 
1845, | iM | The whole day was cloudy and di 
Qh.1Bm., Pm. 2 ped N |76°07/.41 alae B50 | oR BAC 1e whole day was cloudy and damp; 
Nov.1, 3 S i 00°& 180°} 1 + | x ba 76° 077.83 76°07'.83| 32 6 4 a0 O80 there having been a violent storm of| 
fe s s 76 087.25 § mo $4 “te wind and rain the preceding night. 
Sh. 23int. Pm. 2 S /76°05'.1 : 59° | 28.840 ee ee 
Nov.1,| ? ’ ‘| o°& 180°] 2 |$ 76°08/.96| 32 | 9 22. | 2S : 
4 14 04 &, aN 76°12", 12 76° 081.96 76°08'.96) 32 579.5) 28.840) Morning very foggy; the day cloudy; 
1 /¢ ad ¢ + b1n7 1 
Nova) degen $| oraasoe| 1 $5 Pope ¢7oray.1 rocoaa|. aa |§ ae angst neg atmo mst 
3°.0) 28. south-east. 
2 Uh 20m. A.M. N WG°lr' 25 , eae: 36 lax 
Nov.6,| 00 ak } 0°& 180°] 2 | ; Ss cat mp a } et 08/.58 76°08'.58) 32 2 ae phat Wind 8.W. and a fresh breeze; cloudy 
Oh. 5Om., Ae Me } “ l¢ S$ |76°06/.1 43° 28,990 in the morning; fair in the afternoon. 
Nov.7,) 7207 0°& 1809} 2 |§ 8 | af, 2 08/.8 008/89) 35 , ; 
ofits ' BA P.M. sade . Ch ROL: 59 76° 08.89 76°08'.89| 32 1 46°.5| 28.975| Cloudy and rainy; fresh west wind. 
Dip observed on the plane of the a meridian, by a mean of one hundred and sixty observations on two needles, . 
Nov. 
[Nov. 
| th Bm | 
A.M. 
415 00 PM. 
4lt1h.5 51m. A.M. 
10 35 ~/ 
16m, P.M 
50 so a.M. 
+38», P.M. 
eo 
.56m., P.M. 
5D A.M. 
Aim, P.M. 
< 
| 
| 
. 
| 
| 
.0lm., P.M, 
56 ¢ 
1. 20/71., P.M, 
D,) 18 o 
| 2h.45m., P.M. 
| 3: 38 ‘ 
| dh. 14m, ene le 
|} 1 56 ys 
6 
j195°& 15° 
285° & 105° 
210° & 30° 
300° & 120° 
(225°& 45° 
(315° & 135° 
1240° & 60° 
(330° & 150° 
_ 
= 
| 
76° 08'.64 
L, deni | Jobserved. |5”computed t) 
6°377.81 2 | 552 | 28, 
(8 ahh 56 § (70°80'.68=é }76° 35.84 |—0'.84 32 ; aoe Laaaae 
S |36°24'.2 |, sles 76°09."72 66° | 28.884 
; N_ |86°207.38 ¢ [96°22'30 =7"186° 207.80 | —1’.50 82 |} 540 |28730land tainy, 
o5a/ 7 98 F 3 
; fe Wreeweg 77°57 42=i 77° 56/44 |—0'.98 32 554°" bet 
, omar 76°09'.97 mao loa aad 
5 AN ipoonocs ¢ (32°59.35=7 82° 58”.10 won 82 |} S40 | ox7a7 
Ss (e} 7 ‘ ie) 
,N 50°04 92 ¢ 80°05.'08= {80° 06.18 |-+0".20 9 32 rH sage 
8 [502077.03 9 leno9g/05-—=r'180° ow/18 0.77 § 7690877). | § 68°.5| 28,884 
N_ |80°06’.87 § sceeat eae © 12 55°.5} 28,719 
Ss OB Bl -f 7020) 6 , 
5 Ny [asegeon ¢ 82°58/42=/ 2° 58,10 | 7.32 32 | S605] e716 
S OBIT! C 76°08/.20 As <> "5 
}N seamen 7a ¢ (77°55'.85 —i'(77° 507.44 | 407.59 82 |} S500] aura 
8 t Og y¢ onoc . ) % e! i" 
iat, ogienen } is6°29".89—~i 86° 207.80 |—2'.09 32 \ saagl e270 
tS Ireea7"84 9 76°10'.12) |e ago" | os, Bd 
; N [reoad3s ¢ Greets 36—1//76° 35/.84 |—0/ 52 32 ri 53°91 28708 
Ss |y9°5u'.09 ag | § 68°.5) 28.884 
5 In [ooo yy25 ¢ [90200'17~z [90° 007.00 | 01.17 32 Fi Beanie 
face * " ‘ ‘ 
|Dip, by three hundred and twenty observations on needle No. 1, observed in the various 
{ 
\Nov.7, 
and reduced by computation to the 
‘Dip, 
Qh. VY, AM 2 | 
1 19> em, j 
,|104.17m., a.m. 
1.48 | PM. ;| 
« |L0h.31m., a.m. 
2 O01 P.M. 
10h.48m., a.m. 
vo 
11h.0: 
” or 
22 Mis 
_{L1A.19m., a.m. 
2 40. Mm, 
L1h.32m,, a.m. 
2 63. P.M. 
46m., A.M. 
05 P.M, 
04m., P.M. 
1th. 
Q 
wo 
Oh. 
3 
Oh. 
3 
ee Gane Cn Cente Ce a 
by three hundred and twenty observations on needle No, 2, observed in the various azimuths stated in column three, 
st = 
90°86 270°| | 
15° & 195° 
105° & 225° 
30° & 210° 
120° & 300° 
nai 
¢ 
wo 
DN NNN NNN ANN ANN NENA, NN NE 
S$ 189959725 } 
N 189°59/.5 56 § 
Ss 6° 3} 397 33 
N |76°30/.97 ; 
8 |86°20’.53 
186°19/.88 § 
77°53) 44 ? 
- Me 
6 
80°06". ‘a4 
819 
N 130206" 5 
Ss (O30: 3. 72) 
N Ge 
S vOf 
N 36°21'.54 Hi 
S [7623928 2| 
N |76°36/.66 § 
plane of the magnetic meridian, . . 
azimuths stated in column three, 
|age5y41 
ms 77°56/.00 =7 
32°60’.26 = 
76934921 
86°20/.20 =i 
82°56’.18 =7' 
80°05'.04 ==7 
80°04’.11 =? 
i ine 58.10 
70°54 50 7! 
90° 00/.00 
70° 35,/84 
86° 20’.80 
77° 5044 
| 
\82° 58’,10 
80° 06/18 
80° 067,18 
779 5O!.A4 
i 86° 20.80 
& 
(76°34. 97 =i 76° 35/84 |- 
v 
=i! 
4.59 
4-0'.92 
4.07.40 § ‘ 
+044 9 | 
Loos 
LVd4 
2,07 
—1/,09 
76°08. 
76°00’. 
76°07’ 
— 2.16 
+ 1/94 
7) 
and reduced by computation to the plane of the magnetic meridian, 
76°077.93) 
39 | § 409.5 fas. 996 
ae Ste 28,978| See 
39 |$ 44° ies. 990)of the 7th. 
5 ape } 452298078 
"| gg |§ 44°.2)28.989) 
ue ten 28.976 1 
32 64 49.228 
nal [048° 
ge |$ 22. 
32 3 fe 
we Tee 
17 ¢ 
as jireabanes 
Ge { 4195 28,060 
47°.7/28, 9834 | 
= | 32 4 42.205. 9041 
| | 32 § 479,798,989 
a ( 4027.25 ; 
32 |$° 
ie 28,980 
1 ha 0°, loa71 
above reraark on the weather 
{ 
See above remark for the 4th Non 
On the 5th the weather was cloudy} 
| 
A light south wind. 
76° 09'.856 
76° 07',.68 
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