iV. W. Point of the Lake of the Woods. 



49 



Mr. Thompson's Monument No- 1. 

 Equal Altitudes of the Sun for ascertaining the Time. 



after By Arnold 211L 



59 14 



58 32 

 57 45 5 



56 49 5 

 56 5 5 

 55 22 5 

 54 39 



Result : Uncorrected noon by the mean of all 



observations, - - - - Oh 5' 24" OO 



Correction, - - - - - + 9 56 



Apparent noon, - - - . o 5 33 56 



Mean time at the apparent noon, - 5 43 12 



Arnold slow of the mean time of Mr. Thompson's 



Monument No. 1, Aug. 4th, Oh 5' 7" M. T. 9 56 



Mr. Thompson's Monument No. 1. 



Circummeridian Observations for de- C Index error + 2" 3 

 termining the Latitude. ( Thermora. 75°i 



Double Altitude of Time by Arnold 

 2111. 



Sun's U. L 

 116° 12' 10" 



12 

 6 

 5 

 4 

 3 



Aug. 4. Oh 16' 30"5 

 18 51 

 21 42 



Double Altitude of 

 Sun's L. L, 



il4°"59^ 50" 

 54 50 



48 50 



Result: Zenith distance of the Sun's centre at noon, 32^^ 

 Refraction less parallax. _ - _ 



Sun's declination, 

 Latitude of Mr. Thompson's Monument No. 1. 



9' 38" 93 

 30 30 

 17 12 53 14 



49 23 2 37 



Latitude of the two Stations. 



From the mean of all observations made at the same station, 

 the following results have been deduced : 



Latitude of Mr. Thompson's Monument No. 1, 49° 23' 6" 48 

 Latitude of the Station near the Rat Portage, 49 45 56 54 



Vol. XV.— No, L. 7 



