-21 



Ankerpladgten paa Vestsiden ligger lo. "it nordligere og 1' 

 49. "1 vestligere end Fugleberget. Ankerpladsep paa Vest- 

 siden ligger altsaa 2' 'JL"."3 nordligere og 4' 27" vestligere 

 end Ankerpladsen paa Østsiden. Er for den sidste <( „ — 

 70° 58/0 og X = 0* 33'» 48/3. saa bliver for Ankerplad- 

 sen paa Vestsiden <y>„ = 71" 0' 1" og X„ =; 0» 34 ffl 6.'1. 



Elter de mindste Kvadraters Methode beregnede jeg 

 de sandsynligste Correctioner til ff „ og X . 



Naar jeg deretter grupperede Differentserne (hvis 

 Kvadratsum er Minimum) mellem de observerede (redu- 

 cerede) Hojder af Solcentret og de eftér de fundne sand- 

 synligste Værdier for Bredden og Længden beregnede, efter 

 de observerede Solrender, viste det sig. at Middeldifferent- 

 sen for ovre Rand var -f: 0/295 og for nedre Rand 

 — 0/282. Den observerede Solradius er saaledes gjennem- 

 snitlig t0. '3 større end den til Beregningen benyttede. 

 Corrigeres med denne Størrelse, faaes de i den følgende 

 Tabel anførte Værdier af Differentserne / mellem obser- 

 veret minus beregnet Solhojde. I Tabellen eve alle Uhr- 

 tider reducerede til Reid, og alle maalte Soihøjder corri- 

 gérede for Iudexfejl. Kimmingdaling, Re,fraction, Parallaxe 

 og Solradius (Naut. Almanacs). o betegner ovre Solrand, 

 n nedre Solrand. Aflæsningerne paa Sextanten ere gjorte 

 i Secunder og Reductionen udfort med Secunder, men da 

 den sandsynlige Fejl af en enkelt Hojde er over et halvt 

 Minut. opføres i Tabellen Tiendedels Minut, ligesom Be- 

 regningen efter de mindste Kvadraters Methode er ført 

 med femzifrede Loearithmer. 



anchorage off the east cdast. From the foot of the Fugle- 

 berg, the height of the mast, as measured by mysélf on 

 the 29th of July. gave an angle of 0° 55. '5, whicb corre- 

 sponds to a distance of 0.'62. At this point, the azimuth 

 of the ship from the Fugleberg was about 70°. Computing 

 with these results, our anchorage off the west coast should 

 lie lo. "il farther north and 1' 49."1 farther west than the 

 Fugleberg. Hence. the anchorage off the west coast lies 

 2' L."3 tarther north and 4' 27" farther west than the 

 anchorage off the east coast. Assuming for the latter </„ 

 = 70" 58/0 and '/.„ = 0* 33'" 48/3. for the anchorage off 

 the west coast cp = 71" o' l" and X a — 0* 34 m 6. 1. 



By the method of the least squares, I computed the 

 most probable corrections of </„ and /.„. 



Tben, on grouping the differences (the sum of the 

 squares of which is a minimum) between the observed 

 (duly corrected) altitudes of the sun's centre and those 

 computed with the most probable valnes found for latitude 

 and longitude, . according to the observed solar limbs. the 

 mean difference for the upper limb proved to be -f- 0/295, 

 and for the lowef — 0/282. On an average, therefofe, 

 the observed semidiameter of the sun is 0/3 greater than 

 tliat tåken for the computation. Corrected with this quan- 

 tity, we get the values given in the following Table for 

 the differences, J, between the observed and the computed 

 solar altitudes. In this Table all chronometer-times are 

 reduced to those of the Reid chronometer, and all observed 

 altitudes corrected for the index-error, the dip of the hori- 

 zon. refraction, parallax, and the sun's semidiameter (from 

 Naut. Alnmnae): o signifies upper solar limb. n lower solar 

 limb. The readings of the sextant were noted in seconds, 

 and their reduction computed in seconds; hut the probable 

 error of a single altitude amounting to more than half a 

 minute. tenths of a minute have been given in the Table. 

 The computation by the method of the least squares is 

 made with rive decimals in the logarithms. 



Ankerplads paa Vestsiden. 1877. Juli 30. 

 (Anchorage on the West S/de. 1877. July 30.)' 



