Astronomical and Meteorological Records^ ££?c. xxix 



to be the highest hill in the neighbourhood of the Council Bluft'. By- 

 adding 15 feet, which is about the height of the pond above the low- 

 water mark of the Missouri river, we shall have 350 feet for the height 

 of the top of the bluft" above the low-water mark of this part of the Mis- 

 souri. 



M the point ivhere the Missouri bluffs cross the Boyer river, the fol- 

 lowing observations were made to find the latitude. 



April 17, 1820. 



Meridian double altitude of 

 sun's lower limb 



Index error — 3 ' 5 1 " . Latitude 

 deduced 



117° 45' 10" 



41 32 23 N. 



Bij Lieut. Talcott with a theodolite of 4i inches radius. 



April 17, 1820. 



Meridian altitude of sun's 



upper limb 

 Do. of sun's lower limb 



Latitude deduced 



Mean of the preceding observations 



59^ 23' 00" 

 58 50 45 



41 32 07 N. 



41 32 15 N. 



On the Elk-horn river 20" of latitute south of the fording place on the 

 trace from the Council Bluff to thePownee Villages, the following 

 observations were made. 



. Meridian double altitude of 

 sun's lower limb 



April 21, 1810. 



Index error — 3' 55". Latitude^ 

 deduced - - 5 



120° 43' 15" 



41 26 16 N. 



April 21,1820. 



By Lieut. Talcott, at the same place. 

 Meridian double altitude of 

 sun's upper limb 



Index error + 2' 00". Latitude^ 

 deduced - - ' 



121° 41' 40" 



41 25 58 N. 



Mean latitude by the preceding observations 41 26 07 N. 



Observations made at the village of the Republican Pawnees, situated 

 on the Loup Fork of the river Platte. 



April 29, 1820. 



Meridian double altitude of 

 star Polaris, («. Ursee Minoris) 



Index error- 

 deduced 



■4' 00". Latitude 



79° 21' 45" 



41 16 43 N. 



