OBSERVATIONS ON THE MAGNETIC DIP AND DECLINATION. 
XX XIII. 1848,— October 10th. 
tributary of the River St. John, Maine. 
The point of observation is astronomical station No. 18, on a small island of the river 
St. John, opposite to the mouth of Big Black River. 
69° 26’ 46”, W. 
Nerve No. 1. 
Polarity of No. of Time of 
Marked end. Readings. Observation. 
Ss 16 11h. 57m., A.M. 
N 16 0 48 P.M. 
Dip, by thirty-two observations on needle No. 1, 
Neep te No. 2. 
) 16 1h. 25m., P.M. 
N 16 ey 4 
Latitude 46° 57’, N.; Longitude 
‘Temperature, 
59° 
58 .O 
59° 
58 .5 
Dip, by a mean of thirty-two observations on needle No. 2, 
Dip, by a mean of sixty-four observations on needles No. 1 and 2, 
Cloudy, and occasionally a sprinkle of rain. 
XXXIV. 1843,— October 17th. 
N 16 Oh. 17m., P.M. 
Ss 16 te co 3 
Dip, by thirty-two observations on needle No. 1, 
NEEDLE No. 2. 
N 16 2h. 02m., P.M. 
S 16 2 51 oy 
Dip, by thirty-two observations on needle No. 2, 
Dip, by a mean of sixty-four observations on needles Nos. 1 and 2, . 
Cloudy. Occasional sunshine during the observations. 
XXXV. October 29th, 1843. 
@ 
o 
on 
or 
A7 
St. John, New Brunsnick. 
Latitude 47° 21’ 39”, N.; Longitude 68° 19’ 25”, W. 
NEEDLE No. 1. 
Ss 16 1h. 32m., P.M. 
N 16 2 32 a 
Dip, by thirty-two observations on needle No. 1, 
NEEDLE No. 2. 
S 16 
N 16 
2h. 59m., P.M. 
4 44 % 
Dip, by thirty-two observations on needle No. 2, : 
Dip, by a mean of sixty-four observations on needles ‘Nos. 1 and 2, 
50°.5 
44 5 
43° 
40 .5 
Mouth of the Chimpassaooctuc, or Big Black River, a 
Dip observed. 
fi, Besse 
77° 36'.12 
10° BU AT 
77° 36'.56 
77° 30,12 
COT 84 
11. SCO 
Wind easterly and light. 
Near the Grand Forks of the River St. John. 
The point of observation is the astronomical station, where the line of ten miles, mea- 
sured in the shortest direction from the North-West Branch, touches the river St. John 
Latitude 46° 34’ 37”, N.; Longitude 69° 53’ 00”, W. 
NEEDLE No. I. 
77° 23'.43 
77° 28'.15 
Lh. e009 
77° 26'.34 
77° 25'.84. 
77° 26'.09 
77° 25'.94 
Wind westerly. 
At the mouth of the Madawaska River, a tributary of the 
77° 48' 34 
11.46! 16 
77° 47' 24 
77° 45'.25 
77° 50’.18 
77° 47'.7) 
77° 47! AT 
