168 M. Hisinger on the Geology of Sweden. 



been done, except in the case when the accelerating forces 

 urging the particles are explicitly given. 



The foregoing solution of the problem is essentially the 

 same with that contained in my paper, Phil. Trans. 1824. 

 M. Poisson has objected to my conditions of equilibrium in 

 an article printed in the Annales de Physique et dc Chimie, 

 tom. xxvii. p. 225, which I have not examined till very lately, 

 since the publication of his remarks in this Journal for July 

 last. If his objections have not been noticed here, care has 

 been taken to place the subject in such a point of view as 

 to avoid their force. Of his arguments, when they are not 

 chargeable with insufficient reasoning, — some do not apply to 

 my theory, and some are not inconsistent with it. But the 

 length of what I have written obliges me to postpone my 

 further remarks on this subject to a future occasion. 

 Aug. 6, 1827. James Ivory. 



[To be continued.] 



XXXI. Collections in Foreign Geology. — [No. III.] By 

 H. T. De la Beche, Esq. F.R., L., and G.S. 4'C. 4'c- 



[Continued from page 109.] 



9. Introdmtion to the Mineral Geography of Swed.e7i ,- by 

 M. Hisinger*. 

 T^HE Scandinavian Peninsula, extending from S.S.W. to 

 -*- N.N.E. from the southern point of Scania to Cape North, 

 is cut into a multitude of gulfs [Fiordar) on its western side, 

 and traversed by a long chain of mountains [Fiellrygg) from 

 Lindesnaes in Norway to the Frozen Ocean, approaching 

 nearer to the North Sea than the Baltic ; so that its western 

 side is very steep, whilst towards Sweden the land falls in a 

 very gradual manner. The southern part of this chain is 

 named Langfield ; the middle portion Dovrefield. The latter 

 obliquely cuts the Peninsula, and is prolonged to above lake 

 Oresund, at the point where the Herjedal and Jemtland abut 

 on Norway. The Scandinavian Alps may thus be divided 

 into three or four portions, which are united in such a man- 



* From a notice in Baron de Ferussac's Bulletin des Sciences, for March 

 1826, of a German translation in Leonhard's Zcitschriftfdr Mincra/ogic. 



For excellent descriptions of the primitive rocks of the northern part of 

 our island, which (with similar rocks in Ireland) may be considered as the 

 geological prolongation of the Scandinavian Peninsula, consult Dr. Mac- 

 culloch's Western Islands, Classification of Rocks, and papers in the 

 Geological Transactions. For those of the E. of Ireland, the memoir of 

 Mr. Weaver, in the Gcol. Transactions. — Trans. 



ner 



