ASTRONOMICAL OBSER\ ATIONS. 

 APPENDIX A— Continued. 



17 



CAMP 44 W— SEPTEMBER 2d, 1835— Continued. 

 Observer — Lieut. R. S Williamson*, t'. S. Top Engineers 



Object observed. 



Timeof'observ'u J Observed double 

 by watch. altitudes 



Altair., 



Index error, — 4' 40." Barometer, 25.4 in. Thermome- 

 ter, 490. 



CAMP 45 W— SEPTEMBER 30, 1855. 

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



Polaris . 



Altair , 



d. to. s. 



88 12 40 



88 13 20 



88 14 00 



88 14 20 



88 14 00 



88 15 10 



88 16 00 



88 17 30 



88 17 40 



88 18 50 



88 19 50 



109 33 30 



109 34 10 



109 34 50 



109 35 20 



109 35 40 



109 35 30 



109 35 30 



109 35 30 



109 35 40 



109 35 40 



109 35 



109 35 



1«9 34 



109 33 



40 

 10 



30 



■ID 



Index error, — 5' 30". Barometer, 28.9 in. Thermome- 

 ter, 56°. 



CAMP 48 W— OCTOBER 2, 1855. 

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



h. in. s. 



Sun's upper limb i 9 19 31.2 



9 20 07.6 



9 20 50.8 



9 21 26.0 



9 22 02.0 



9 22 42.0 



3 AA 



CAMP 48 W— OCTOBER 2, 1855— Continued. 

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



Object observed. 



Time of olserv'n 

 by watch. 



Suii's upper limb , 



h. to. s. 

 9 23 20.8 



Sun's upper limb 



23 59.6 



24 37.6 



25 16.8 



25 56.0 



26 35.2 



27 14.4 



29 12.4 



Observed double 

 altitudes. 



Polaris . 



Altair 



2 

 o 



2 



2 31 05.2 



2 31 44.0 



29 50.8 



30 28.8 



29 

 30 

 30 

 31 

 32 

 33 

 33 

 34 

 35 

 36 



01 

 02 

 03 



04 



7 05 



04.4 

 08.0 

 51.2 



38.0 

 21 .2 

 02.0 

 42.8 

 30.0 

 21.2 

 12.4 



51.6 



58.4 

 40.8 

 32.8 

 13.0 

 56.8 

 32.4 

 14.8 

 07.2 

 43.2 

 26.4 

 23 . 6 

 34.8 

 28.4 



d. TO. S. 



63 40 00 



63 50 00 



64 00 00 

 G4 10 00 

 04 20 Oil 

 64 30 00 

 64 40 00 



63 20 00 



63 10 00 



13 00 00 



62 50 00 



02 40 00 



88 40 2J 



88 41 00 



88 41 30 



88 42 00 



88 42 40 



88 43 20 



88 43 40 



88 44 10 



88 44 50 



88 45 20 



109 14 40 



109 14 50 



109 15 00 



109 15 00 



109 15 01) 



109 14 50 



109 14 511 



109 14 30 



109 14 10 



13 30 



13 oo 



12 50 



109 11 30 



109 10 30 



109 

 109 

 10'J 



Index error, — 5' 0''. Barometer, 29.1 in. Thermome- 

 ter, 590.5 



CAMP 48 W— OCTOBER 3, 1855. 

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



Polaris 



Altair 



