16 



RECORD AND RESULTS OP 



Sei 



)tembcr 10, 



1860. 



Correction of p 



Dck 



et chron 



ometer — 50° 



' 3P.9 

















Mean a2'(0 & 10th) 



Qh 4im 22.^0 



23'> 50" 



50M 



2007 : 4" 43 



1 



—4'' 



62" 0919 



—4'' 62" IP. 8 



41 25.2 



50 



53.3 



1062 : 4 40 





—4 



49 06.7 



—4 49 08.3 



42 05.3 



51 



33.4 



740 : 4 41 





—4 



49 26.6 



—4 49 28.2 



September 2S 



, 1860. 











jr sr Adopted 

 Port Foulke Boston. jr 



ll"-' 52-" 4513 II'' 



02" 02^0 



2007: 



15h 54m 



—4" 



51 



" 58'.0 



+ P.06 



+ 0^4 



+ 0''.6 



53 31.2 11 



02 47.9 



1062: 



16 52 



—4 



49 



12.1 



— 0.29 



+ 0.2 



0.0 



54 08.1 11 



03 25.4 



740: 



15 53 



—4 



49 



34.6 



— 0.49 



0.0 



— 0.2 



The adopted rate is found by givirrg the weight | to the Port Foulke rate to 

 make some allowance for the effect of the greater cold at this place. There are no 

 means of obtaining sea rates for the chronometers. 



We have accordingly the following chronometric results : — 



aT .July 7tli 



on Greenwich time. 



2007: +i" 35''.3 



1062: +0 57.0 



740: +1 14.7 



A T September 9th 

 on Greenwich time. 



+ 2", 14= 

 + 57 

 + 1 02 



A T September 9 & 10 

 On Port Foulke time. 



i^ 52™ 12^ 



—4 49 08 

 —4 49 28 



Mean 



Longitude of 

 Port Foulke. 



4" 54" 26' 



4 50 05 



4 50 30 



4 51 40 ± 56' 



A result to which we can attach but little value. 



The determination of the longitude of Port Foulke by means of the known 

 meridian of Van Rensselaer Harbor, and the geodetic difference of longitude with 

 Port Foulke, involves as an intermediate step the position of Cairn Point if we 

 wish to deduce the most reliable result. Cairn Point is the northern terminal cape 

 of Smith Strait, as Cape Alexander is that of the southern, both located on the 

 Greenland shore. At Cairn Point numerous measures were taken, important for 

 the geography of the strait, besides it served as a point of departure for the northern 

 journeys. Before, however, giving the astronomical observations at this point, the 

 remaining time observations taken at Port Foulke, and required for the determina- 

 tion of the longitude of Cairn Point and other stations, wHl first be given. 



Observations for time, Port Foulke, May 29th, 1861. 

 Altitudes of the sun. S. J. McCormick, observer. 



Chronometer 2007 









7" 10" 24= 



30° 46' 



40" 



10 55 



43 



20 



11 30 



42 



30 



T = + 32° 



B = 29'^72 at 56° 



Correction for index, dip, refraction and parallax = ■ 



N. B. Befraction very great when these sights were taken. 



6' 04' 



Semidiameter 15' 48" 



T K ^ 



7" 10" 66'. 3 I 590 05' 26" | +21° 42' 40" 



I 36° 32' 10' 



E aT 



-2" 52'. 6 I 4" 47" 40'. 6 



Altitudes of the sun, June 7th, 1861. S. J. McCormick, observer. 

 Chronometer 2007 Q \ 



^h 5gm 12' 



58 43 



59 07 



30° 09' 10" 

 08 10 

 07 10 



T = + 32° 



B = 29^72 at 64° 



Corrections as above. Semidiameter 15' 47' 



Ordinary refraction 



T K 



7* 58" 40'. 7 I 590 41' 07" 



+ 220 49' 09" 



( E aT 



48° 03' 26" I — 1" 25'.3 ] 4" 47" 52'.3 



