242 ADDITIONAL NOTICES, [June 25, 1860. 



of the following; work w^cre published in 1856 and 1857 : "Arc du Me'ridien dc 

 25° 2(y entiele Danube etla Mer Glaciate, mesure depuis 1816 jusqn'en 1855, 

 sous la direction du Comte de Tenner, Lieut.-G^neral de I'Etat Major Imperial de 

 Eussie ; Chr. Hansteen, Directeur du Departement Geographique Eoyal de 

 Norv^ge ; N. H. Selander, Directeur de I'Observatoire Eoyal de Stockholm ; 

 F. G. W. Struve, Directeur de I'Observatoire Central Nicholas de Bussie." 



Christiania Observatory being the initial point of issue for the trigonome- 

 trical survey of the kingdom, the exact determination of its situation is of 

 the very greatest importance. A chronometric expedition was undertaken by 

 Professor Hansteen in 1847^between Christiania and Copenhagen, for the deter- 

 mination of the ditference of longitude of these cities. The results of this 

 expedition, furnished with twenty-one chronometers, which were carried twelve 

 times forward and backward between the above mentioned cities, are given in 

 the work by Hansteen and Feamley, entitled ' Description and Situation of the 

 University's Observatory at Christiania, 1849.' 



However excellent the older charts of the coasts of southern Norway were, 

 new ones, corresponding with the progress of science, were highly desirable ; 

 and Major Vibe having been charged with their construction made five special 

 and one general chart of the coast from the Swedish frontier to Christiansand, 

 during 1851 to 1856. They are accompanied by descriptions of the coast and 

 land. The work has since been carried on by Lieut. Schie of the Engineers, 

 who in four charts has farther represented the coast towards the west, past 

 Egersund. The two general maps of Northern Norway, by Professor Munch, 

 . were published by the Ordnance Office. 



1. The triangulation extends over the dioceses of Christiania and Chris- 

 tiansand and over parts of Bergen and Drontheim, also over the coast of 

 Nordland and Finmark. The number of signals erected, and other points, the 

 position of which has been trigonometrically determined, amount to 3900. 



2. Of drawn trigonometrical skeleton maps there are 270. 



3. Manuscripts containing astronomical observations, trigonometrical tables, 

 co-ordinate calculations, determinations of declination, hypsometrical and other 

 measurements, soundings, descriptions, with many other manuscripts, amount 

 to 550 volumes. 



4. In detail are completely measured the dioceses of Christiania and 

 Christiansand ; of the diocese of Bergen 140, and of that of Drontheim 110 

 geographical square miles. The whole of the measured area in south Norway 

 may be estimated at 1070 Norwegian or about 2410 geographical square miles. 



5. This detailed measurement is contained in about 2800 sketch-maps with 

 appertaining special descriptions. 



6. Besides the maps finished, large maps have likewise been drawn, each 

 comprising about 25 Norwegian square miles. Thirty-eight such maps have 

 then been made, comprising altogether 850 Norwegian, or about 1910 geo- 

 graphical square miles. 



7. llie coast has been hydrographically examined ; in the first place all along 

 southern Norway, afterwards over Nordland and Finmark, and, again in the 

 southern part of the kingdom, the tract from the Swedish boundary to 

 Hardangerfiord. 



8. The verified charts of the coasts and of the appearances of land already 

 drawn amount to about 400, with descriptions in manuscript. 



9. The number of measurements of heights amount at present to about 

 6500. Up to 1849, these have been published in the second and third volumes 

 of the ' Gsea Norvegica,' and a complete collection up to 1859 is in hand. 



10. The following printed maps and charts have left the press : — 



A. Maps. — Munch, general map of Northern Norway, 2 sheets; Munthe and 

 Ramm, maps of districts, 6 sheets; Gjessing, ditto, 8 sheets. B. Coast Charts, 



