IN THE ARCTIC SEAS. 



May 14, 1854. Oljservatioiis of circum-iiieridiau altitudes of tlio sun, for latitude. 

 Gambey sextant ; on the floe near the brig. 



Pocket chronoraete 



Double altitude. 



Pocket chronometer. 



4h 40™ 5G» 



41 41 



42 35 



4 43 40 



44 40 



45 34 



Double altitude. 



59° 36' 00" 

 35 50 

 35 40 



60 38 45 

 38 20 

 31 50 



Indexerror — 1' 10". t= + 1°AF. 6 = 29.84 in. t = + 51°. 

 For chronometer error and rate, see observations for time, May 16, 17, 19. 



O's corrected alt. (for index, refraction, and parallax) 

 Chronometer time of observation 

 Chronometer fast of Fern Rock mean time 



Mean time of observation 

 Hour angle . 

 Hence reduction to meridian 

 O's declination 

 Resulting latitude . 



Mean . 



30° 02' 38" 



4h SQm 03s 



4 39 27' 



30° 02' 25" 

 41. 43m 12* 



4 39 27 



23 56 36 03 45 

 + 30 + 07 40 

 + 0".2 and + 24".9 

 + 18° 39' 53" 18° 39' 57" 



78 37 15 78 37 07 



78 37 11 



May 15, 1854. Observations of circum-meridian altitudes of the sun, for latitude. 

 Gambey sextant ; on the floe near the brig. 



Pocket chronometer. 



o 



o 



4h 28" 38^ 



29 12 



30 15 



4 31 37 

 32 30 

 34 23 



Double altitude. 



59° 51' 10" 

 51 45 

 51 30 



60 55 10 

 55 10 

 55 30 



Pocket chronometer. 



o 



Q 



4'' 35"" 25^ 



36 22 



37 12 



4 38 07 

 39 14 

 39 53 



Double altitude. 



59° 52' 40' 



52 40 

 52 30 



60 55 10 

 55 10 

 54 30 



Index error— 14' 1". t = + 8°.4 F. b = 29.93 in. * = + 



46°. 



O's corrected alt. (for index, refraction, and parallax) 30° 17' 01" 



Chronometer time of observation 

 Chronometer fast of Fern Rock mean time 



Mean time of observation 

 Hour angle 

 Reduction to meridian 

 G's declination 

 Resulting latitude . 



Mean . 



4h 3im 06' 

 4 32 26" 



23 51 40 

 — 04 26 

 + 8".3 

 + 18° 54' 09" 



78 37 00 



30° 17' 13" 



4U 3'jm42a 



4 39 20 



23 58 16 



+ 02 10 

 + 2".0 



+ 18° 54' 10" 



78 36 55 



78 36 58 



' For chronometer error and rate see subsequent observations. 

 " For chronometer error and rate see further on. 



