17 



Efter de norske Kystkarter ligger Vardøhus paa : 



Bredden 70" 22' 5" 



Længden 31° 7' .35" = 2'' 4" 30/3 E. Greenwich. 



Efter en senere tumlet Correction for en Regnefej] 

 skulde imidlertid Punkterne østenfor Nordkap Ugge c. 22" 

 østligere end i Kartet, altsåa Vardøhus paa Længden 31° 

 7' 57" = 2'' 4»' 31/8, hvilken Værdi kun er 6" eller 

 0/4 -større end den at mig fundne. 



On the Norwegian coastal charts, Vardøhus is in 



Latitude 70* 22' 5" 



Longitude 31° 7' 35" = 2'' 4"' 30/3 E. Greenwich. 



Meanwhile. the points east of the North Cape should, 

 according to an er ror of calculation subsequently discovered, 

 lie about 22" farther east than on the chart, Vardøhus 

 therefore in longitude 31° 7' 57" =r 2 h 4" 31/8; and this 

 valne exceeds my determination by oidy (3". or 0/4. 



Sammenstilles de af mig fundne Længder med de 

 paa de norske Kystkarter udmaalte. faar man følgende 

 Oversigt: 



A comparison between my determinations of longitude 



and those on the respective Norwegian charts gives the 

 folio wing results: — 



Med Undtagelse af Bodo ere Kartets Længder mindre 

 østlige end mine. Forskjellen er imidlertid kun en Brøkdel 

 af et Minut, i Storcirkel kun en Brøkdel af et halvt til 

 et Trediedels Minut, og Tilstrækkeligheden af Nojagtig- 

 heden af Karternes Længde for Skibsfarten antages saale- 

 des godtgjort. Karternes Bredder synes gjennemgaaende 

 nøjagtige. saavidt ovenstaaende Iagttagelser kunne tjene til 

 dei'es Verification. 



Saving that of Bodo. the longitudes on the chart are 

 none of them so far east as mine. Meanwhile. the diffe- 

 rence does not amount to more than a fraction of a minute. 

 and in are of great circle it is only a fraction of half to 

 one-third of a minute: hence. the accuracy of the longitudes 

 on the charts may be regarded as sufrieient for all practical 

 purposes of navigation. The latitudes on the charts would 

 appear to be generally correct, so far as the- results set 

 forth above can serve for their verification. 



8. Advent Baj. • 



Paa Odden, ved den vestre Bred af Indløbet til 

 Advent Baj. der gaar i sydøstlig Retning ind fra den indre 

 Del af Isfjorden paa Spidsbergens Vestkyst, tog jeg den 

 20de August 1878 to Rækker Solhøjder til Bestemmelse 

 af Bredden og Længden af det Punkt, der var Utgangs- 

 punktet for Iagttagélserne til Oonstructionen af det Kart. 

 som Capt. Wille optog over Bajen med Omgivelser. 



Omstændighederne vare. ikke meget gunstige. Luften 

 var tildels meget taaget. saaat Blændglassene ofte maatte 

 vexles. ja kunde stundom .endog undværes. En Folge af 



Den norske Nordliavsexpedition. ,H. Mohn: Astronomiske Observationer, 



8 Advent Bay. 



<_)n the tongue of land jutting out from the western 

 shore of the entrance to Advent Bay. which extends in a 

 south-easterly direction from the inner part of lee Sound 

 on the west coast of Spitsbergen. I took on the 20th of 

 August. 1878, two series of ' solar altitudes. to determine. 

 the latitude and longitude of the point at which were com- 

 menced the observations for the survey made by Capt. Wille 

 of the Bay and its environs. 



Circumstances were anything but favourable. the atino- 

 sphere being so hazy at intervals that the coloured glasses 

 had to he frequently chahged, nav could now and again 



