ASTRONOMICAL OBSERVATIONS. 



l l J 



APPENDIX A— Continued. 



III. Observations on the routes of detached parties, in charge of Lieut. H. L. Abbot, U. S. 



Topographical Engineers. 



CAMP 40 A— SEPTEMBER 7, 1855. 

 Observer — Lieut. II. L. Abbot, U. S. Top. Engineers. 



Object observed. Time of observ'n 



by watch. 



a Cygni 



Arcturus. 



Pola 



h. 



7 



7 

 7 

 7 

 7 



m. 

 29 

 31 

 33 

 34 

 35 

 3G 



39 

 41 

 42 

 43 



44 

 4G 



57 

 59 

 01 

 02 

 03 

 05 

 06 

 08 

 09 

 10 



33.5 

 55.0 

 20.0 

 20.0 

 21.0 

 13.5 



24.0 

 19.5 

 42.0 

 49.5 

 59.5 

 33.0 



47.5 

 26.0 

 08.0 

 41.0 

 57.0 

 26.0 

 40.0 

 31.0 

 33.0 

 44.0 



Observed double 

 altitudes. 



d. m. s. 



138 33 to 



139 22 10 



139 50 00 



140 11 30 

 140 33 30 

 140 50 50 



51 43 30 



51 02 50 



50 31 30 



50 10 00 



49 43 50 



49 12 10 



89 37 ]0 



89 38 50 



89 40 40 



89 44 20 



89 46 10 



£9 49 20 



89 50 00 



89 52 10 



89 54 CO 



89 55 50 



Index error, 0. Barometer, 26.0 in. Thermometer, 

 70O.0. 



CAMP 41 A— SEPTEMBER 8, 1855 

 Observer — Lieut. H L. Abbot, U. S. Top. Engineers. 



Jupiter , 



Arcturus. 



h. in. s. 



8 35 29.5 



8 37 25.0 



8 39 01.0 



8 40 37.5 



8 41 56.0 



8 42 08.0 



49 21 40 



49 44 20 



50 03 10 

 50 18 50 

 50 33 40 

 50 46 30 



Polaris 



59 

 01 

 04 

 05 

 08 



14 

 16 

 17 

 21 

 24 

 25 

 27 

 28 

 30 

 32 



33.0 

 30.5 

 24.0 

 53.5 

 19.0 



51.0 

 19.0 

 37.5 

 37.5 

 11.5 

 26.0 

 02.5 

 37.0 

 50.0 

 57.0 



46 50 10 

 46 06 50 

 30 

 20 

 43 44 20 



45 07 

 44 35 



90 52 10 



90 53 50 



90 55 20 



91 01 



10 



06 20 



30 



91 



91 09 



91 10 



91 12 



91 15 49 



91 18 30 



20 

 50 



Index error, 0. Barometer, 27.1 in. Thermometer, 

 55O.0. 



CAMP 42 A— SEPTEMBER 9, 1855. 

 Observer — Lieut. H. L. Abbot, U. S. Top. Engineers. 



Object obsorved. 



Time of observ'n ! Observed double 

 by watch. altitudes. 



« Cygni . 



Arcturus. 



Polaris , 



h. 



7 

 1 

 7 

 7 

 7 

 7 



m. 

 19 

 21 

 23 

 24 

 25 

 26 



31 

 32 

 33 

 34 

 35 

 36 



41 

 43 

 44 

 47 

 48 

 50 

 52 

 54 

 55 

 56 



s. 



16.0 



47.5 



26.5 



37.5 



56.5 



53.5 



II. 

 18.0 

 37.0 

 48.0 

 47.5 

 50.0 



53.5 

 02.5 

 32.5 



30.5 

 27.0 

 31.5 

 14.0 

 05.5 

 23.0 

 45.0 



d. wi. 



138 46 



s. 

 10 



139 38 30 



140 13 20 



140 38 30 



141 06 30 

 141 25 20 



55 11 20 



54 47 20 



54 19 50 



53 55 40 



53 32 50 



53 12 20 



90 25 

 90 26 

 90 28 



10 

 40 

 40 



90 29 50 



90 30 



90 32 



40 

 10 



90 33 50 



90 35 10 



90 35 50 



90 36 50 



Index error, -\- V 50". Barometer, 28.8 in. Thermome- 

 ter, 50°. 5. 



CAMP 44 A— SEPTEMBER 15, 1855. 

 Observer — Lieut. H. L. Abbot, U. S. Top. Engineers 



Jupiter , 



Arcturus 



Polaris. 



Index error, 0. Barometer, 29. 6 in. Thermometer, 52O.0. 



