Vol. 50.] ADDITIONS TO THE LIBRARY. 253 



Langsdorff, W. XJeber den Zusammenhang der Gangsysteme von 

 Clausthal und St. Andreasberg. 8vo. Clausthal, 1884. Pur- 

 chased. 



Gang- und Schisten-Studien aus dem westlichen Oberharz. 



8vo. Clausthal, 1885. Purchased. 



Lapparent, A. de. Les Causes de l'Ancienne Extension des 

 Glaciers. 8vo. Brussels, 1893. 



. Traite de Ge'ologie. Troisieme Edition. Partie l re et 2 me . 



8vo. Paris, 1893. 



. . . Deuxieme Partie. Geologie proprement 



dite. Ease. 5. 8vo. Paris, 1893. Purchased. 



La Touche, T. D. See India. 



Launay, L. de. See Fuchs, E. 



Lawson, A. C. See Minnesota. 



Leigh, W. S. See New South Wales. 



Lent, C. See Baden. 



Lepsius, Richard. Geologie von Attika. Ein Beitrag zur Lehre 

 von Metamorphismus der Gesteine. 4to. Berlin, 1893. Pur- 

 chased. 



. . See Maps : Attica. 



. Geologie von Deutschland und den angrenzenden Gebieten. 



Band i. Lief. 3. 8vo. Stuttgart, 1892. Purchased. 



Lesquereux, Leo. See United States. 



Lesslin, Adolphe. Liste des Mine'raux et des Roches de la Vallee 

 de Liepvre (Canton de Sainte-Marie-aux-Mines). 8vo. Colmar, 

 1865. Purchased. 



Lewis, H. Carvill. Papers and Notes on the Glacial Geology of 

 Great Britain and Ireland. Edited from his unpublished MSS. 

 with an Introduction by H. "W. Crosskey. 8vo. London, 1891. 

 Presented hy Mrs. Carvill Lewis. 



Libert, — , et Miciol, — . Catalogue Mineralogique et Petrologique 

 du Finistere. 8vo. Morlaix, 1885. Purchased. 



Lindahl, J. See Illinois. 



Linne, Carl von. See Periodicals &c. Stockholm. 



Lippmann, E., et G. F. Dollfus. Un forage a, Divers (Calvados). 

 8vo. Paris, 1893. 



Liversidge, A. On the Origin of Moss Gold. 8vo. Sydney, 1893. 



. On the Condition of Gold in Quartz and Calcite "Veins. 



8vo. Sydney, 1893. 



