74 GEOLOGY. 



2 plates. Reprinted from the Supplement to the K. Svenska Yet.- 

 Akad. Handl. 



The asars of pebbles in Smaland owe their origin to continental ice. 

 The gravel- beds were formed by running water acting through the 

 crevasses upon the bottom-moraines of glaciers and of land-ice generally, 

 the direction of the ridges or §,sar of this gravel being determined by the 

 vaulted channels which exist at the base of glaciers, and which thus be- 

 come the original moulds in which the asars were formed. The fact that 

 the direction of the water-flo w, when once it reached the bed of the glacier, 

 depended solely upon the form of the ground accounts for the fact that 

 these pebble-deposits are sometimes found trending in directions oppo- 

 site to those of their parent ice-masses. The plates consist of two maps, 

 one (on a scale of 1 : 200,000) showing the pebble-deposits of Halland 

 and Sm^and, and the other (on a scale of 1 : 1,000,000) the same 

 deposits in the Malar basin. In both these maps the directions of the 

 glacial striae, which closely agree with those of the gravel-beds, are 

 shown. G. A. L, 



Hummel, David. Beskrifning till Kartbladed " Trosa." Pp. 72, 



3 plates (map and sections). Sveriges Geol. undersok. [Descrip- 

 tion of Map, No. 52. Swedish Geological Survey.] 



Jaedin, Ed. Yoyage geologique autour de I'lslande, fait en 1866 sur 

 la fregate la Pandore. [Geological voyage round Iceland.] Pp. 39, 

 2 plates. 8vo. Paris. [Reprinted from Bull. Soc. Academique.] 



Jeevis, G. Cenni geologici suUe montagne poste in prossimita al 

 giacimento di antracite de Demonte. 8vo. Turin. 



. I Tesori Sotterranei dell' Italia. Parte Seconda. Eegione del? 



Apennino e Yulcani attivi e spenti dipendentivi. [Subterranean 

 Treasures of Italy. The Apennines and Yolcanoes.] Pp. xviii, 624, 

 8vo. Turin. Lithograph and woodcut views. 



Jespeesek, M. Scania and Bornholm. Geol. Mag. dec. 2, vol. i, 

 pp. 528, 1 fig. in text (section). 



In the island of Bornholm is found the same formation as the coal- 

 bearing one of Scania. The thickness at Bornholm is probably 2000 

 feet, including 20 coal-seams, from a few inches to 10 feet thick, some 

 of which are worked. The age of the beds is disputed ; but they are low 

 down in the Secondaries. G. A. L. 



JoHNSTEUP, P. Cm Hsevningsfaenomenerne i Moens Klint. [On 

 the phenomena of dislocation and upheaval at Moens Klint.] 

 11 Skand. Natur. Porhandl. 



• . (Efversigt over de palaeozoiske Dannelser paa Bornholm. 



[Palaeozoic rocks of Bornholm.] 11 Skand. Natur. Porhandl. 

 — -— . TJeber die Lagerungsverhaltnisse und die Hebungsphanomene 



in den Kreidefelsen auf Moen und Eiigen. [Chalk of Moen and 



Rugen.] Zeit. deutsch. geol. Gesell. Bd. xxvi. pp. 533-585, 



2 plates. 



