110 M. Ch. Martins' Fci7iarks on 31, Durocher's Memoir 



tempting to explain the greater part of the geological phe- 

 nomena, which he mentions in connection with the hypothesis 

 of diluvian currents. 



Directioti of the Strife. 



M. Durocher's new Memoir commences with an account 

 of the direction of the striae in tlie south of Scandinavia. He 

 gives a map of these directions, in which he fills up some 

 blanks left by MM. Seftsroem,*]3oethling,t Siljeatroem,! and 

 Keilhau.§ But these gaps are so few in number, that by 

 uniting the three charts to which we refer, it will be easy to 

 construct that of M. Durocher. 



The general result of the author's new researches is, that 

 the direction of the strioe are not parallel, neither in the dif- 

 ferent provinces of the peninsula, nor in any limited locality ; 

 but that they often form more or less open angles with each 

 other, both in the same country, and in very remote pro- 

 vinces. MM. Siljestroem and Keilhau had previously ar- 

 rived at the same result, without endeavouring to seek for 

 an explanation of it. This M. Durocher has attempted, but, 

 perplexed with the multiplicity of these directions, he is com- 

 pelled to refer them to numerous systems, or to different 

 groups. Thus, for example, he found that in the neighbour- 

 hood of Christiania and Lake Mioesen, the greater part of 

 the striae have a ceiH:ain orientation. Around Areskutan, 380 



* Untersuchung iiber die auf den Felsen Scandinaviens in bestiramter Kich- 

 tung vorhandenen Furchen. — Annales cle Physique de Poggendorf, t. xliii , p. 533. 

 1838. With a map of the direction of those striaj throughout the whole of 

 Southern Sweden, from 56th to 61st degree of latitude. 



f Ueber die diluvial Schraramen in Finnland. — Ann. de Physique de Poggen- 

 dorfff t. Hi., p. 641. 1841. With a map of the orientation of the striae in Fin- 

 land. 



% Voyages in Scandinavie de la Commission du Nord. — Oeographie Physique, 

 t. i., p. 193. With a map of the whole of Scandinavia, and the mean direction 

 of the striae in Norway, drawn by M. Bravais, according to the indications of 

 the author. 



§ Reise fra Christiania til den Oestlige Deel af Christiansands stift i som- 

 meren, 1840. — Nouveau Mag asin pour les Sciences Naturelles de Christiania, t. iii., 

 p. 169. 1841-42. With a map, shewing the orientation of the strife in the 

 western part of the Gulf of Christiania. 



