ASTRONOMICAL AND GEODETIC OBSERVATIONS. 



Mean time of apparent noon 



Chronometer error 



Chronometer time of apparent noon 



%- 



Chronometer time of sun's maximum altitude 

 From reflecting circle, with r = — 1' 24".6 



+ 5"'25=.8 



. _ 1 01 39.3 



11 03 46.5 



—30.8 



11 03 15.7 



-1' 24".5 7t,= +1" 



10" 50"49^5 



10 54 36 



11 03 37.5 

 11 06 30 



33° 51' 41" 



33 52 36 



33 53 35 



33 53 07 



mA 



107" 



52 







7 



h -\-mA 

 33° 53' 28" 

 28 

 85 

 14 



From sextant, with r = — 1' 26". 2 



10" 57"" 53=.3 



11 00 46.7 



11 10 29 



11 13 33.7 



33° 52' 41" 



33 52 31 



33 51 59 



33 51 29 



Mean, by circle and sextant 

 90 + S, + 2/ 





33 53 



26 



1' 26".2 



^,= +T" 





20" 



33° 52' 



61 



4 





35 



36 





35 



72 





41 





33 52 



43 





. 33 53 



05 



• 



. 106 16 



09 



72 23 04 



This latitude was also determined by Kane, July 19, 1853, A. Sonntag, observer.- 

 I found 72° 22' 58". 



The mean of the two determinations, or 72° 23' 01", has been adopted as a 

 reliable latitude of the Governor's house at Proven. 



Observations for longitude, August 7th. 



Chronometer comparisons; aT= + 1" 

 Chronometer. Pocket chronometer. 



OP 



37^9 for pocket chronometer. 



Mean time. aT 



2007 



5'' W^ 



0" 30" 47^6 



1" 32™ 25^5 



—3" 40" 34". 5 



1062 



5 14 



31 21.6 



1 32 59.5 



—3 41 00.5 



740 



5 15 



32 29.5 



1 34 07.4 



—3 40 52.6 



(N. B. Another comparison on the 6th shows the correctness of the above.) 

 The correction and rate of the three chronometers were determined at Boston, 

 July 7, 1860, by WiUiard, as follows:— 



Chronometer. 



2007 



1062 



740 



A r at Boston on 

 Greenwich time. 



+ 1" 35^3 

 + 57.0 

 + 1 14.7 



Boston rate ST' 



+ o^4 



+ 0.2 

 0.0 



A T on Green w. time A Ton Proven time Long, of Proven 

 Augiist 7. August 7. west of Greenwich. 



+ 1" 



4717 



—3" 



40" 



34^5 



3>' 



42"" 



22=. 2 



+1 



03.2 



—3 



41 



00.5 



3 



42 



03.7 



+1 



14.7 



—3 



40 



52.6 



3 



42 



07.3 



Mean 



3 42 11.1 



The longitude determined approximately by Kane, in 1853, was 3'" 42" 30' (see 

 p. 41 of his Astronomical Observations). 



• Smithsonian Contributions, 1860 : Kane's Astronomical Observations in the Arctic Seas, p. 36. 



