INDEX TO. VOLUME XX 
Richards, R. W., and G. R. Mansfield. The Bannock Overthrust: 
A Major Fault in Southeastern Idaho and Northeastern Utah 
Road Materials of Washington, The. By Henry Landes and Others. 
Review by A. E. F. : 
Rock-cut Surfaces in Desert Ranges. Ts Sidney Paige : 
Rock Minerals, Their Chemical and Physical Characters and Their 
Determination in Thin Sections. By Joseph P. Iddings. Review 
by Albert Johannsen Mea Ceram. soe See ae 
Rocks and Their Origin. By G. A. J. Cole. Review by W. H. H. 
Rogers, Austin F. A New Specific Gravity Balance. Review by 
Harold E. Culver 
Rogers, G. S. The Geology of ihe Corlandt Saale and ie mer 
Deposits. Author’s Abstract 
Review of Geology of the Ney Vouk Gy Aqueduct iy 
Charles P. Berkey 
Review of Influence of rescue on he, Melene Bares ai 
Certain Metals, by J. Johnston and L. H. Adams 
Review of the Melting-Points of Minerals in the een of 
Recent Investigations on the Gas Thermometer, by A. L. Day 
and R. B. Sosman 
Review of the Nature of ‘Wollents Netion: ie Regmald i 
Daly . Ra rae ye ih Uae oh) lan) cg eh ay See 
Review of Preliminary Note on the Geology of Southeast 
Kincardineshire, by Robert Campbell 
Review of What Is a Metamorphic Rock ? be ie H. Ih 
Schwartz 
St. Louis Quadrangle, Missouri-Illinois, Geology and Mineral Resources 
of the. By N. M. Fenneman. Review by A. E. F. : 
Schlosser, Max. Beitrige zur Kenntnis der Oligoziénen andes 
diugetiere aus dem Fayum (Aegypten). Review by S. W. W. 
Schmelzversuche mit Bisilicaten und Titanalen. By S. Smolensky. 
Review by Albert D. Brokaw 
Schmelzversuche iiber Bisilicate mit Sulfiden tnd Hlalopenverbia 
dungen. By A. Woloskow. Review by Albert D. Brokaw 
Schneider, Karl. Die vulkanischen Erscheinungen der Erde. Review 
by Albert Johannsen ee ia Se 
Schwartz, E.H.L. What Isa Metamorphic Rock ? Review by G. S. 
Rogers : ‘ aay ae : ‘ : : : : i 3 
Sheldon, Pearl. Some Observations and Experiments on Joint Planes. 
I 
Some Observations and Experiments on Joint Planes. II 
Siebenthal, C.E. Geology and Water Resources of the San Luis Valley, 
Colorado. Review by A. E. F. 
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