ASTRONOMICAL OBSERVATIONS. 



APPENDIX A— Continued. 



CAMP 22— AUGUST 7, 1855— Continued. 

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



Object observed. 



Time ofobserv'n 



by chronometer. 



a Serpentarii. 



Polaris. 



A. 



54.0 

 53.0 

 21.0 

 37.0 



48.0 

 37.5 

 41.0 

 39.0 

 23.0 

 18.0 

 15.5 

 32.0 

 39.5 

 59.5 



Observed double 

 altitudes. 



A. m. s. 



123 23 30 



123 22 50 



123 22 10 



123 20 50 



81 12 50 



81 14 40 



81 15 20 



81 16 50 



81 17 10 



81 17 30 



81 18 40 



81 19 20 



81 19 50 



81 20 20 



Index error - 

 ter, 64°. 



•6' 30". Barometer, 26.0 in. Thermome- 



CAMP 23— AUGUST 8, 1855. 

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



a Cygni . 



Arcturus. 



o Serpentarii 



Polaris . 



ft. 



8 

 8 



m. 

 24 



26 

 28 

 29 

 30 

 31 



57 



59 

 00 

 01 

 03 

 04 



8 10 



8 11 



8 13 



8 14 



8 15 



8 1G 



8 17 



8 18 



8 20 



8 21 



8 39 



8 40 



8 41 



8 42 



8 43 



8 44 



8 46 



8 47 



52.5 

 24.5 

 18.0 

 24.5 

 38.5 

 43.5 



35.5 



24.5 

 41.5 

 56.5 

 25.0 

 29.5 



31.0 

 34.0 

 13.5 

 33.0 

 49.0 

 56.5 

 58.0 

 57.0 

 23.5 

 29.5 



02.0 

 25.0 

 20.0 

 07.5 

 03.5 

 18.0 

 14.5 

 24.5 



d. m. s. 



115 27 20 



115 57 10 



116 38 10 



117 00 30 

 117 25 40 

 117 49 40 



92 20 00 



91 49 40 



91 12 00 



90 44 50 



90 12 40 



89 49 20 



122 49 00 



122 50 111 



122 51 00 



122 51 10 



122 51 30 



122 51 20 



122 51 00 



122 50 00 



122 49 20 



122 49 10 



81 47 20 



81 48 30 



81 49 20 



81 50 00 



81 50 10 



81 51 40 



81 53 00 



81 54 00 



CAMP 23— AUGUST 9, 1855. 

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



Object observed. 



Sun's lower limb. 



Sun's lower limb. 



Sun's lower limb. 



Time of observ'n Observed double 

 by clironometer. altitudes. 



m. 

 11 

 11 

 12 

 12 

 13 

 13 

 14 

 14 

 15 

 15 

 16 

 16 

 17 



43 

 43 

 44 



44 

 45 

 45 

 46 

 46 

 47 

 47 

 48 

 48 

 49 



11 55 



11 56 



11 57 



11 58 



11 59 



11 59 



12 01 

 12 02 

 12 03 

 12 04 

 12 05 



19.0 

 48.0 

 13.5 

 44.5 

 13.5 

 43.0 

 10.5 

 39.5 

 10.0 

 39.5 

 1)6.0 

 36.0 

 07.0 



20.0 

 50.5 

 18.0 

 47.0 

 17.0 

 46.5 

 16.5 

 47.0 

 14.0 

 42.0 

 10. 

 37.5 

 08.5 



02.0 

 01.5 

 27.0 

 21.5 

 06.0 

 54.5 

 00.5 

 07.0 

 40.0 

 58.0 

 58.0 



d. m. s. 



91 00 00 



91 10 00 



91 20 00 



91 30 00 



91 41) 00 



91 50 00 



92 00 0(1 

 92 10 00 

 92 20 00 

 92 30 00 

 92 40 00 



92 50 00 



93 00 00 



93 00 00 



92 50 00 



92 40 00 



92 30 00 



92 20 00 



92 10 00 



92 00 00 



91 50 00 



91 40 00 



91 30 00 



91 20 00 



91 10 00 



91 09 00 



128 42 20 



128 43 20 



128 44 20 



128 44 55 



128 45 10 



128 45 20 



128 45 15 



128 45 10 



128 44 30 



128 42 55 



128 41 50 



Index error —6' 30". Barometer, 25.8 in. Thermometer, 

 7I°.5. 



CAMP 24— AUGUST 10, 1855. 

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



Cygn 



Arcturus.. 



Index error — 6' 30". Barometer, 25.9 in. Thermometer, 

 720. 



Polaris. 



8 26 25.5 

 8 27 35.5 

 8 28 19.5 



81 57 40 

 81 58 30 

 81 59 50 



