100 GEOLOGY. 



crater of the Laacher 8cc. The occurrence of zircon is noted in the 

 gre5'stone lava of Niedermendig. The outcrop of this lava-bed was ob- 

 served at Thiir, from which village to the Hochstein it forms a well- 

 defined ridge ; and the author refers the source of the lava to the latter 

 volcano. The Hochzimmer and Bellerberg volcanoes are described. 

 The latter seems to have been formed within the crater of a much larger 

 one, of which some remnants were observed. These eruptions seem 

 to have been among the oldest in the district. E. T. H. 



'& 



Nordenfelt, Thorsten. l^otes on Iron-ore Deposits at Naeverhaugen, 

 near Bodce, Norway. Journ. Iron Steel Inst. pp. 149-155. 



The deposits rise 600 feet above the surrounding level, and extend 

 more than 6 miles. Layers of limestone, eurite, mica-schist, and a 

 grey gneiss are found in association with the ironstone. Magnetic ore 

 sometimes occurs in the surrounding eurite and limestone ; the iron- 

 stone is almost entirely specular. The ore resembles brown or red 

 haematite, though it belongs to an older formation than the English 

 haematites. Analyses are given. E. B. N. 



Nordenstrom, G-. Ytterligare meddelanden om Solstads koppargrufva 

 i Smfiland. [Additional Account of Solstad Copper-mine, Sraaland, 

 Sweden.] Geol. Foren. Stockholm Fork. Bd. iii. pp. 2-8 ; 2 plates. 

 Describes the shaft-s'n^^ing and level-driving made in order to reach 

 the lode, which at 800 feet below the surface had suddenly thinned 

 out. The vein was found again in a level 1000 feet below the sur- 

 face, but 200 feet to W.N.W., the dislocation being occasioned by a great 

 reversed fault. Some notes as to faults in other Swedish mines are 

 given. A section showing the situation and dislocation of the vein is 

 given on a scale of 1 : 1600, and a plan on the same scale. E. E. 



Novov, — . [Coal-beds in the W. District of the Donetz Hills.] 

 Gornoi Journ. vol. iii. pp. 93-112, 4 pis. (sections). 



Ochsenius, — . Ueber die Salzbildung der Egeln'schen Mulde. 



[Salt-formation of the Egeln Basin.] ZeitscJi. deutsch. geol. Ges. 



Bd. xxviii. Heft 3, pp. 654-666. 



Brings forward some theoretical considerations as to the manner in 



which salt-deposits are formed, and applies these to the N. German 



basin, in which, besides salt, potash minerals form such a valuable 



feature, with gypsum, anhydrite, &c. E. B. T. 



Omboni, G. DeUe antiche Morene vicine ad Arco nel Trcntino. 

 [Old Moraines near Arco.] Atti li. 1st. Ven. Sci. ser. 5, t. ii. pp. 11. 



— . Di due antichi ghiacciaj che hanno lasciato le loro traccie nei 

 Sette Comuni. [Traces of Extinct Glaciers.] Atti B. 1st. Ven. Sci. 

 ser. 5, t. ii. pp. 6. 



Come s'e fatta I'ltalia : saggio di geologia popolare. [Popu- 



lar Account of the Geology of Italy.] Pp. 346. 8vo. Milan. 



