658 



Chase, P. E. Page. 

 Spectrum line F, and otlier lines and data „ 353 



COGLIEVINA, D. 



Drawing and description of his improved "Centigrad Pliotometer." . , 353 



Cope, E. D. 



Lower Jaw of Bacliyopsis hiscidens 197 



Lower Jaw of Trilsodon quiverensis from New Mexico 497 



Ptilodus medicevus [Tooth] from the Lower Eocene of New Mexico . . 498 



DxjBois, Wm. E. 



Engraved disk found in Guatamala 191 



EONTAINE, W. M. 



Saltville Valley and Fault * . . 349, 350 



Fkazer, Persifor. 



Coins ; and specimens of granite and cement, &c., used by the Egyp- 

 tians in erecting the Obelisk now in New York 404 



Hall, Chas. E. 



Geological casts belonging to the State Geological Survey 17 



Hand-colored printed Map of the Philadelphia belt 160 



Harden, E. B. and O. B. 



Two Models in Plaster of parts of Blair county, Penn 352 



Contour Map of the Bald Eagle naountain, and Birmingham hills in 



Blair and Huntingdon county, Penn 523 



Haupt, Louis M. 



Fragments ot Terra Cotta from the Northern Pacific R. K 522 



Specimens ot Silicilied Wood 522 



KoNiG, Geo. A. 



Specimens of Silver Ore from near Ouray in Colorado 195 



Kemarks on Dr. P.F. Eeinsch's recent Plates of the Microscopic Lithol- 



ogy of Anthracite and other coals 353 



LeConte, John L. 



Remarks on Prof. Samuel S. Haldeman 109 



Lesley, J. P. 



Extracts from a Letter of Prof. Lesq.uereux 16 



Sphinx name of the Solar Disc 110 



Virginia Faults 155 



Valentini's Investigation of the . . . Fabrication of Landa's Mayan 



Alphabet 153 



Shells tound at Saltville by Mr. H.C. Lewis . . 155 



Printed sheet of oil well sections and profile colored 160 



Recently executed works of the Geological Survey. 160 



MS. Map of part of the Mahanoy and Shenandoah Anthi-acite basins 



in Schuylkill county. By Mr. Ashburner and Mr. Sheafer 160 



Model of the Stone Mt. Fault, by Chas. E. Billen 193 



Model of a part of the Middle Anthi-acite Coal Field, by Chas. A. Ash- 

 burner 192 



Model of the Seven mountains in Middle Pennsylvania, by Chas. E. 



Billen 192 



Notes on the Models exhibited at the Meeting Nov. 19 193 



Extracts from a Letter from Mr. And. S. 3IcCreath, giving an analysis 



of a pure Dolomite 197 



Index Gauge constructed by Messrs. Young, of Philadelphia 198 



