124 TRANS. ST. LOUIS ACAD. SCIENCE. 



In orchard of Dr. E. McLean, to the N.E. of the house, 105 yds. from 

 the track of the M. P. R.R. and 135 yds. from the river. Polaris observa- 

 tion for meridian. The declination being much less than was expected, 

 it was re-determined at four stations around the primary station and 

 about 40 yds. distant, the meridian being deduced from the observations 

 at the primary station. The magnetic meridian at these stations was 

 determined approximately by a single observation at an observed 

 time of day. These observations showed differences not greater than 

 5' from the mean of all which differed about i' from the mean of two 

 complete determinations made at the primary station. Hence no local 

 influence present. The importance of making the Jefferson City and 

 Washington determinations beyond all doubt was felt while on the 

 ground, and will be appreciated on inspection of the chart of declina- 

 tions. 

 Station 26 rt—//c/^c». Johnson Co., Mo. Lat. 38° 37' ., ; Lon. 94° O3'.o- 

 Observations on the common 125 yds. N. ofthe depot. Two observations 

 on polaris for meridian. In the observation for Aug. 11, the upper tan- 

 gent screw was used by mistake in adjusting on the mark, thus destroy- 

 ing the first mark reading. The weights of the two observations were 

 taken as i and 2. 



Station 26 b. 140 yds W. of the former station. Meridian deduced from 

 observations at Station a. 



Station 27 a — Lexington, Lafayette Co., Mo. Lat. 39° ii'.j ; Lon. 93° 

 52 '.r,. On the "show block" to the E. of town. Polaris observation 

 for meridian. The declination determination differing half a degree 

 from a determination which others had made in the court-house yard, 

 observations were made at 



Station 27 3, which is h. mile distant to the N.W. from the former station. 

 Polaris observations were also made here. These observations were 

 made in the yard ofthe Methodist Female College, 54 yds. S.W. ofthe 

 S.W. corner of the building. Their agreement with the observations 

 of Station a was very satisfactory. 



Station 2% — Sr.heU City, Vernon Co., Mo. Lat. 38° 02'. «; Lon. 94° 

 04.' g. On the prairie E. of town. Meridian determined by equal alti- 

 tudes ofthe sun. 



Station 2^— Parsons, Labette Co., Ks. Lat. 37° JO'-n; Lon. 95° 17'. 4. 

 Observations on the common near the house of A. Wilson, and 70 yds. 

 from the centre of the street in front of the "East-side School-house." 

 Polaris observations were made in Mr. Wilson's yard. 



Station -ip — Springfield, Greene Co., Mo. Lat. 37° 15-' e; Lon. 93° 

 14.' p. Station 84 yds. a little W. of N. of the N.W. corner of Drury 

 College, in a pasture field. Meridian by polaris observations made in 

 the yard of Drury College. 



