336 OBSERVATIONS ON THE MAGNETIC DIP AND DECLINATION. 
February 28, 1840, Observations on the dip of the magnetic needle, repeated at Dr. 
Everett’s house, west bank of the river Sabine. Same station as II., occupied on the 
11th and 12th of February. Latitude 29° 43’ 54”, N.; Longitude 93° 51’ 30”, W. 
Neepte No. 1. 
Bs al fal ail a dh Dip observed, 
N 8 11h. 33m. A.M. 58° 49'.6 
s 8 1 23 P.M. 58° 22',4 
Dip, by sixteen readings of needle No. 1,. .. . . 58° 36’ 
NeEeEvD.e No. 2. 
8 8 3h. 36m. P.M. 57° 49'.2 
N 8 4 28 59° 07'.4. 
Dip, by sixteen readings of needle No.2,. . . . 58° 28'.3 
Dip, by sixteen readings of needle No.1, as above, 58° 36 
Dip, by a mean result from needles No. 1 and No.2, 58° 32’.1 
Differing only 1’.5 from the result obtained from the same needles, at this station on 
the 11th and 12th of February, 1840. 
A light south wind all day. The weather a little cloudy from sunrise till 1, p.m., 
when it was clear and nearly calm till sunset. 
February 29th, 1840, at Dr. Everett’s house, west shore of the Sabine River, near its 
entrance into the sea; Texas. Latitude 29° 43’ 54”, N.; Longitude 93° 51’ 30”, W. 
Same station as II. 
[V. Observations for the magnetic variation were this day repeated at the same station 
which was occupied on the 19th instant, the magnetic bearing of the true meridian 
line was as follows, viz.: 
First, by compass No. 3, by W. J. Young, of Philadelphia, needle six inches long. 
At 11h., a.m. Vane A of compass to the north,— 
Mostn. end of needic reads, ... ... +e. +. whee nhhuee te i ee ee 
South end of needle reads,. . . . er 
Compass vernier, with end of needle at 0, rade. Fei a ae a oe ae 
Vane A of compass to the south,— 
Life 10m: a-m,pmorth end of needle reads,. © ie ge ee BE 
South end of feed le Teme a SS? 2 
Compass vernier, (with the end of the needle at 0 * reads, lig eel 8° 42’ 
Mean of the six readings of compass No. 3, with poles reversed, or, as loft 
ow the 20th imptaihe tees 5 as eee ret oe lowrvd eciisizer pte ee UASt. 
Second, by compass No. 4, by W. J. Young, Philadelphia, needle five and a quarter 
inches long. At 11/. 30m. a.m. Vane A of compass to the north,— 
Morth:end oF neemie reads, 0 RA REOS, 6 ota Ph ee, Bo) OR oa, 
South end of needle reads, .. GO BSe Olt OLB Oe 
Compass vernier, (with the end of the needle at 0 ») resithf EG) PISO We Begs! 
