10 



RECORD AND RESULTS OF 







20 







2© 



0" 49™ 39" 



-' . {»" 



C 57" 25' 





33° 4' {f;' 



50 24 



^* » {t 



58 32 





- ^ {11 



51 24 



'-* » Ifo 



59 07 





33 4 {s; 



T = + 28O.0, B = 29^80 at 62° Index | +33 ^o" 



—30' 40" ) 

 —30 30 j 



f +32' 40" —30' 5C 

 I +32 50 —30 40 



r = — 3'21".8 rti= + 8".l Correctior 



+ 1' 09", applies after 0" 47" 



We have further — 







5 = + 5° 04' 03". 3 f, = T3° 13' 36 



'/ 



Jfci= [0.00024] 



5^= + 5 04 06.0 «r=+ 3^2 





A = 0.21119 



AS =—56". 87 ^£'=-20.6 





^ = — 68'.6 

 y = — 0".5 



Mean time of apparent noon .... 





. —0" 2" 59'. 3 



Chronometer error. ..... 





. + 50 35.5 



Chronometer time of apparent noon 





47 36.2 



» 





. —0 1 08.6 



Chronometer time of sun's maximum altitude 





46 27.6 



T h 



mA 



h + mA 



0" 43"' 28'. 7 



16° 46' 09" 



4" 



16° 46' 13" 



46 55.7 



16 46 30 







30 



50 29.0 



16 46 20 



T 



27 



53 05.3 



16 46 08 



18 



26 



55 58.0 



16 45 48 



38 



26 



58 21.3 



16 45 28 



59 

 value 





27 



Mean, rejecting iirst 



. 16 46 27 



90 + 6, + 2/ . 







. 95 04 06 



^ . 



. 78 17 39+1 



Observations for Longitude of Port Foulhe. 



The material for the determination of longitude is very scanty, and the separate 

 results cannot be made to harmonize as Avell as is desirable. It was Mr. Sonntag's 

 intention to observe as many eclipses of Jupiter's first satellite as could be procured ; 

 unfortunately of this class of observations there are but four now available. The 

 chronometric determination is very unreliable, although the indications of the three 

 chronometers kept tolerably well together as far as Proven, we find them, a month 

 later, diverging to the extent of four minutes ; it is evident, therefore, that they 

 sustained considerable disturbances in their rate, undoubtedly produced by the con- 

 cussions of the vessel with waves and ice. A third way by which I hoped to obtain 

 at least a closely approximate result is partly astronomical, partly geodetic. The 

 meridian of Van Eensselaer Harbor, Dr. Kane's winter quarters in 1853-'54-'55, is 

 well determined astronomically by moon culminations, eclipses, and occultations, 

 and by adding the geodetic difference of longitude between the two observatories, 

 as measured on the track chart, a longitude for Port Foulke was obtained more in 

 excess of its most probable value as that by the chronometers was in defect. We 

 have, therefore, to infer that the distance between Smith Strait and Van Rensselaer 

 Harbor was overrated by Kane. 



I proceed to give the numerical results by each of the three methods. 



