INDEX TO VOLUME XXIX 5 
PAGE 
Ore Deposits, Theoretical Considerations of the Genesis of. By R. H. 
Rastall i : : ; : ; ; ; 4 , ; ; AGT 
Paleontology, The Nature of a Species in, and a New Kind of Type 
Specimen. By Edward L. Troxell . . 475 
Pennsylvanian Sandstones of Osage County, Otome ‘Chand Nee 
WAFS Thy ay, MIBiasatehoveny IOs. gh ge 5 oe ous a ue ve 66 
Petroleum and Natural Gas in Indiana. By W. M. Logan. Review by 
RODS ae : : ‘ 5 : 5 . f ‘ : , go 
Petroleum, Geology of. “EY William Harvey Emmons. Review by 
Kos Bs. : IQI 
Physical Chemistry of ime Gravion and Magenertte lngderentintion 
of Igneous Rocks, The. By J. H. L. Vogt 5 6 4BISy AAG, Srey O27) 
Physical Features of Anne Arundel County, The. By Homer P. Little 
and Others. Review by R. D. S. EE : go 
Piedmont Province of Pennsylvania, Cycles of Birositorn in “hie, By 
F. Bascom ‘ ; : b 540 
Pleistocene History of “Mississippi Vv Allee Ounine of By Frank 
Wevereriun : 615 
Pleistocene Succession Nedr Alton Tine The! and ane Age of fhe 
Mammalian Fossil Fauna.. By Morris M. Leighton ; 505 
Poitevin, Eugene, and Graham, R. P.D. Contributions to the Mineral. 
ogy of Black Lake Area, Quebec. Review by J. F. W. . : ‘ 92 
Powers, Sidney. Strand Markings in the Peony Sandstones of 
Osage County, Oklahoma... . 2 Jae 66 
Pre-Cambrian Literature of North Aracicns Sammanes of By Edward 
Sreidimanm . ss) 4 Satyr ae : , : f F 3 81, 173 
Quirke, Terence. T. Discussion of “Summaries of Pre-Cambrian 
Literature of North America” by Edward Steidtmann . . . 469 
Rastall, R. H. Theoretical Considerations of the Genesis of Ore 
Deposits ... ; Pee A : : : : : 4 : 4 MSI 
Recent Publications : , 5 SSO, O77 
Reed-Wekusko Map-Area, Northern Mentitabe, The. By F. J. Alcock. 
Review by J. F. W. : 5 ea vite) 
Reger, D. B. Detailed Report on weneten County: Nbstrat : : 579 
Report on Berkeley, Morgan and Jefferson Counties [West Virginia]. 
ByACe Py Grimsley.) Reviewsby, AC Vichy lesen) enn) seco 
Report on Braxton and Clay Counties [West Virginia].. By Ray V. 
Henner. Review by A. C. McF. : : : 93 
Ikeviews =. eee 88, 188, 28, ARS, 578, 667 
Rocky Mountain neues in Southeatina Idaho, Types of. By 
George Rogers Mansfield RE FE ha se arity rane ota ee TMI os eafe. W 2t 
