Astronomical and Meteorological Records^ fcfc. xxxix 



Assumed longitude 7^ 01' west. AllowancCj^jlp be made for error 

 and rate of time-piece, as before. 



Longitude of Camp deduced, 7" 02' 39", or 105° 39' 45" W. 



Camp on the ^rlcansa, two miles below the nver St. Charles, or 

 third fork of Pike. 

 Meridian double altitude of 

 Antares 



July 19, 1820. 



Index error — 3' 22' '. Latitude ? 

 deduced - - > 



Sr 36' 00" 



38 14 18 N. 



Camp on the Jlrkansa, at the place where the Exploring Party was 

 divided into two detachments. 



Equal altitudes of Sun to find error of watch, at noon. 

 I Time before Mid- > Time after Mid- 



July 21, 1820. 



night. 



8^ 39' 58" 

 8 38 38 

 8 37 18 



night. 



8'> 



17' 50" ") 

 16 30 J. 

 15 10 J 



Error of Watch. 



17' 19" slow. 

 Mean time. 



»2 mean of eight lunar distances and times correspondent, — nearest 

 limb of moon from star SpiccB Virginis. 



Time per Watch 

 P.M. 



9" 40' 54' 



Distance of Moon i 

 and Star. 



51° 45' 47" 



Index error. 



3' 30" 



July 21, 1820. 



Variation of watch 47" per 12 hours losing. Error of watch to be 

 estimated. Longitude by account 6^ 58' W. Lat. determined by sub- 

 sequent observations. 



Longitude of Camp, 6" 55' 05" or 103° 46' 15" W. of Greenwich. 



Equal altitudes of Sun to find error of watch, at noon. 



July 22, 1820. 

 July 22, 1820. 



Time from Noon, 

 A.M. 



Time from Noon, 

 P.M. 



Meridian double altitude of ^ 

 Antares - - - j 



Index error — 3' 30". Latitude ? 

 deduced - - - j 



Error of Watch. 



18' 06^' slow. 

 Mean time. 



51° 40' 



38 12 22 N. 



