ASTRONOMICAL OBSERVATIONS. 



13 



APPENDIX A— Continued. 



II. Observations on the routes of detached parties, in charge of Lieut. B. S. Williamson, U. S. 



Topographical Engineers. 



CAMP A— AUGUST 13, 1855. 

 Observer — Lieut. R S. Williamson, U. S. Top. Engineers 



Object observed. 



Time of observ'n 

 by watch. 



Observed double 

 altitudes. 



(i Cygni , 



h. m. 



Arctu 



Polaris. 



13 16.4 



14 37.2 

 1G 00.0 

 17 32.0 



19 00.0 



20 18.4 



02 

 04 

 05 

 06 



07 

 08 



24 

 26 

 28 

 29 

 31 

 33 



36.8 

 33.2 

 32.8 

 21.2 

 21.2 

 14.4 



48.8 

 36.0 

 30.0 

 56. 

 09.6 

 05.6 



d. m. s. 



116 19 00 



116 48 20 



117 16 50 



117 49 00 



118 19 20 

 118 47 10 



85 15 10 



84 32 30 



84 11 00 



83 52 50 



83 30 40 



83 10 50 



82 46 40 



82 48 40 



82 49 10 



82 50 00 



82 51 00 



82 53 10 



Index error — 0' 30' 

 ter, 80°. 



Barometer, 26.0 in. Thermome- 



CAMP B— AUGUST 14, 1855. 

 Observer — Lieut. R. S. Williamson, U. S. Top. Engineers. 



a Cygni , 



Arcturus. 



Polaris. 



Index error — 0' 30". 

 ter, 58°. 



Barometer, 26.2 in. Thermome- 



CAMP D— AUGUST 16, 1855. 

 Observer — Lieut. R. S. Williamson, U. S. Top. Engineers. 



Object observed. 



Time of observ'n , Observed double 

 by watch. altitudes. 



a Cygni . 



Arcturus. 



Pola 



ft. m. s. 



8 27 37.2 



8 28 54.0 



8 30 24.8 



8 31 38.8 



8 32 44.8 



8 33 57.6 



15 

 18 

 18 

 20 

 21 

 23 



38 

 40 

 41 

 43 

 44 

 45 

 46 

 47 

 48 

 50 



54.8 

 02.8 

 56.4 

 08.0 

 24.0 

 12.4 



44.4 

 29.2 

 37.6 

 00.8 

 10.0 

 31.2 

 29.2 

 37.6 

 54.0 

 01.6 



d. m. s. 



125 51 30 



126 17 20 



126 49 30 



127 15 10 



1 27 39 00 



128 04 00 



75 48 50 



75 01 30 



74 41 30 



74 14 50 



73 43 10 



73 07 00 



83 50 30 



83 .".2 10 



83 53 40 



83 54 00 



83 55 10 



83 55 10 



83 56 30 



83 57 00 



83 59 00 



84 00 00 



Index error ■ 

 ter, 81°. 



0' 30". Barometer, 26.0 in. Thermome- 



CAMP M— SEPTEMBER 8, 1855. 

 Observer — Lieut. R. S. Williamson, U. S Top. Engineers. 



Polaris. 



Altair., 



