59G 



Lesley, J. P. page. 



Drift Phenomena of the United States 86 



,1. !•'. Carll's colored map of Preglacial Water liasins of Northwes- 

 tern Pennsylvania 180 



Gas Well at Murrayville, in Westmoreland County, Pa 207 



Large Colored Geological Map of Pennsylvania 238 



Lesquereux's Coal Flora Atlas 2'18 



Brazilian Geology and Topography 218 



Slab of Limestone full of Trenton Trilobites 250 



Ancient buried river channel crossing the Allegheny River 854 



t 'mi toured Geological Map of Morrison's Cove 351) 



Contoured Map of Western Pennsylvania 360 



Etymology of rjpax^rj<; 363 



slab of Hoofing Slate Covered with Casts of Buthotrephis flexuosa. . . .364 



Obituary Notice of John W. Harden 418, 422 



The Spirit of a Philosophical Society 582 



Lesquereux, Leo. 



Extract from his letter on a Specimen of Cordaites 219 



On a Branch of Cordaites Bearing Fruit 219, 222 



Marks, Wm. D. 



New Link-Work for describing Arcs of Epicycloid Curves 180 



Specimens of Peaucellier Cell Forms 180 



New Combination of Peaucellier Cells 183 



Theoretical Limits of the Power of Coal 213 



Compound Compass 238 



McCarter, H. G. 



(SeeSadtler below.) 183,185 



McKean, W. V. 



Daily and Periodical Literature 577 



McQuillen, John H. 



Vivisection of the Brain of a Pigeon 02 



Norris, Isaac. 



A Microphone 213 



Phillips, Henry, Jr. 



Descriptive List of Medals Struck to Commemorate the Battle of 



Waterloo . , . 78, 84 



Some Notes Upon the Collection of Coins and Medals at the Penn- 

 sylvania Museum and School of Industrial Art 183,191 



Additional Notes, &c 327, 358 



Earthquake at Aix la Chapelle, August 2Gth, 1868 213,216 



Account of an Old Work on Cosmography 109, -111, 11 '> 



Platt, Franklin. 



Character of some Sullivan County Coals 183,184 



Prime, Frederick. 



Glacial Drift of Northampton County, Pa *1 



Price, Eli K. 



Nature's Reforesting 2,26 



Rogers, Fairman. 



Obituary Notice of Joseph Henry 416, 01 



SADTLER, Samuel P. 



Chemical Preparation from a Reaction of Petroleum 44 



