18 



AS I'RONOMICAL OBSERVATIONS. 



APPENDIX A— Continued. 



CAMP 46 W— OCTOBER 3, 1855— Continued. 

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



Object observed. Time of observ'n Observed double 



by watch. altitudes. 



AUair . 



Index error, — 5' 00". Barometer, 29.1 in. Thermome- 

 ter, 5u'3. 



CAMP 49 W— OCTOBER 4, 1355. 



Observer — Lieut. R. S. Williamson — V. S. Top. Engineers. 



Polaris. 



h. m. 5. 



Altair . 



6 52 



6 53 



6 54 



6 55 



6 56 



6 57 



6 58 



6 59 



59 

 00 

 02 

 03 



24.0 

 36.0 

 21.6 

 10.0 

 39.2 

 48.4 

 30.4 

 30.0 

 32.4 

 41.2 



45.2 

 30.8 

 26.0 

 07.6 

 25.6 

 26.0 

 14.8 

 00.0 

 48.8 

 46.8 

 38.4 

 23.2 



88 56 20 



88 58 00 



88 58 10 



88 58 20 

 B9 00 20 



89 01 20 

 89 02 30 

 89 03 30 

 89 04 30 

 89 05 10 



108 48 20 

 00 



1(18 49 

 108 49 



20 

 10 



108 50 



108 50 40 

 10 

 20 



108 51 20 



108 51 



108 51 



108 51 

 108 51 



20 



00 



108 49 50 

 108 48 40 



Index error, — 5' 00". Barometer, 29.4 in. Thermometer, 

 66°.5. 



CAMP 50 W— OCTOBER 5, 1855. 



Observer — Lieut. R. 8. Williamson, U. S. Top. Engineers. 



Polaris. 



CAMP 50 W— OCTOBER 5, 1855— Continued. 

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



Object observed. 



Time of observ'n Observed double 

 by watch. altitudes. 



Polaris 



Altair . 



12 18.4 



13 28.0 



14 26.0 



15 34.8 



49 22.4 



50 in.8 



51 01.6 



51 52.8 



52 42.8 



53 26.0 



54 02.0 



54 38.0 



55 32.4 



56 58.0 



57 48.0 

 6 58 31.2 

 6 59 10.4 



(/. 771 . .S 



89 32 40 



89 33 40 



89 34 20 



89 35 00 



108 16 20 



108 17 20 



108 17 00 



1H8 17 50 



108 18 10 



108 17 50 



108 18 10 



108 17 50 



108 18 00 



108 18 00 



108 17 20 



108 16 40 



108 16 10 



Index error, — 5'00". Barometer, 29.6 in. Thermometer, 

 57°. 



CAMP 51 W— OCTOBER 6, 1855. 



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



Polaris . 



Altair . 



Index error, — 5' 00". Barometer, 29.7 in. Thermometer, 

 50O.5. 



