INDEX TO VOLUME XXXI 697 



PAGE 



Lavas of the Hawaiian Volcanoes, The. By Henry S. Washington. 



Review by Albert Johannsen 82 



Leighton, Morris M. The Differentiation of the Drift Sheets of North- 

 western Illinois 265 



Leucitic Lavas, Italian, as a Source of Potash. By Henry S. Washing- 

 ton. Review by Albert Johannsen 80 



Lewis, J. Volney. Determinative Mineralogy. Review by D. J. F. . 86 



Lipari, The Rhyolites of. By Henry S. Washington. Review by Albert 



Johannsen 81 



Lithophysae in a Specimen of Obsidian from California, Note on the. 



By Fred E. Wright. Review by Albert Johannsen .... 84 



Loegel, L. Ammergauer Studien: I. Pflanzendecke in ihren 

 Beziehungen zu den Formen des alpinen Hochgebirges. Book 

 Notice 616 



Loewinson-Lessing, F. The Problem of the Anorthosites and Other 



Monomineral Igneous Rocks 89 



McKinstry, H. E. Review of Mineralogy of Pennsylvania, by Samuel 



G. Gordon 434 



McLintock, W. F. P. Guide to the Collection of Gemstones in the 



Museum of Practical Geology. Book Notice 616 



MacPherson, E. O., M. Ongley and. The Geology and Mineral Re- 

 sources of the CoUingwood Subdivision, Karamea Division. Book 

 Notice . 616 



Mapleton, Blackall Range, South-Eastern Queensland, Anorthoclase 



Basalt from. Book Notice 616 



Martonne, Emmanuel de. Abrege de Geographic j)hysique. Review 



byA. H. B 263 



Merritt, J. W. The Structural and Metamorphic Geology of the Han- 

 over District, New Hampshire. Review by A. C. McF. . . 166 



Mesozoic and Cenozoic Plants of North America, A Catalogue of the. 



By F. H. Knowlton. Review by A. C. N 88 



Miarohtic Structure, An Association of Kaolinite with. By A. F. 



Buddington . ' i49 



Micrometer for Rock Analysis, An Improved Recording. By Chester K. 



Wentworth 228 



Microscopy of Anthracite Coal, A Preliminary Report on the. By 



Homer G. Turner and H. R. RandaU 306 



Mineral Resources [Vermont]. By G. H. Perkins. Review by 



A. C. McF 168 



Mineralien in den Einschliissen des Basaltes vom Finkenberg bei Beuel, 



Die. Von Clementine Wurm. Review by Albert Johannsen . 85 



Mineralography of the Feldspars, The, Part 11. By Harold L. AUing 282, 353 



