55 GEOLOGY 



'55 1 73 Murchison, Sir R. I. Siluria : history of the oldest roc 



in the British Isles and other countries. Lond. 1867. 



'5S I 79 Ball, Sir R. Cause of an ice age. Lond. 1891. 



'55*79 Qeikie, J. Great ice age and its relation to the an- 

 tiquity of man. Lond. 1894. 



55179 Wright, W. B. The Quaternary ice age. Lond. 1914. 



55179(494) Penck, A., and Bruckner, E. Die Alpen im Eis- 



zeitalter. 3 vols. Leip. 1909. 



5518 STRUCTURAL GEOLOGY. 



5518 Dwerry house, A. R. Geological and topographical 



maps. Lond. 1911. 



5518 Leith, C. K. Structural geology. New York 1913. 



5519 AGENTS OF GEOLOGICAL WORK. 



55192 Tyndall, J. Forms of water in clouds and rivers, ice 



and glaciers. Lond. 1874. 



55194 Elsden, J. V. Chemical geology. Lond. 1910. 



55196 Darwin, C. Structure and distribution of coral reefs. 



Lond. 1874. 



552 LITHOLOGY. 



B.M. -552 British Museum Mineral department. Introduction 

 Fie 2 to the study of rocks. By L. Fletcher. Lond. 1909. 



55202 Marker, A. Petrology for students. Camb. 1902. 



55202 Hatch, F. H. Text-book of petrology. Lond. 1909. 



55202 Hatch, F. H., and Rastall, R. H. Petrology of sedi- 

 mentary rocks. Lond. 1913. 

 55202 Hommel, W. Grtmdzuge d. systemat. Petrographie. 

 Vol. l-> Berl. 1919-> 

 55202 Mennell, F. P. Manual of petrology. Lond. 1913. 

 55202 Rosenbusch, H. Elemente der Gesteinslehre. 



Stuttg. 1901. 



55202 Mikroskopische Physiographic der Mineralien und 



Gesteine. 4 vols. Stuttg. 1904-08. 



55202 Weinschenk, E. Fundamental principles of petrology. 



New York 1916. 

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3ks 



