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Geological Notes

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 529-536

Note on the Progress of the Second Geological Survey of Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 537-544

First Addition to the Fauna of the Puerco Eocene

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 545-563

On the Brains of the Eocene Mammalia Phenacodus and Periptychus

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 563-565

Some Microscopic Distinctions between Good and Bad Timber of the Same Species

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 599-604

An Improvement in the Construction of the Hypsometrical Aneroid

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 604

Some Comparative Tables Showing the Distribution of Ferns in the United States of North America

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 605-612

Obituary Notice of the Rev. Dr. Charles Porterfield Krauth

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 613-628

Fourth Contribution to the History of the Permian Formation of Texas

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 628-636

Stated Meeting, Jan. 19, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 638-640

Stated Meeting, Feb. 2, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 640-641

Stated Meeting, Feb. 16, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 641-642

Stated Meeting, March 16, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 644-645

Stated Meeting, April 6, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 645-649

On the Measurement of Electromotive Force

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 649-655

Henry Draper

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 656-662

Map of the Terminal Moraine

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 662-664

Note on a Large Fish-Plate from the Upper Chemung (?) Beds of Northern Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 664-666

On the Kingsmill White Sandstone

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 666-673

Early Records of the Society

Published in Proceedings of The American Philosophical Society, in 1883, in volume 20, issue 113, pages 675-678

The Tutelo Tribe and Language

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 1-47

The Latitude of Haverford College Observatory

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 78-81

On a Crinoid with Movable Spines

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 81-88

The Role of Parasitic Protophytes. Are They the Primary, or the Secondary Cause of Zymotic Diseases?

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 88-93

On the Reversion of Series and Its Application to the Solution of Numerical Equations

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 93-101

On the Conversion of Chlorine into Hydrochloric Acid, as Observed in the Deposition of Gold from Its Solutions by Charcoal

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 102-109

Stated Meeting, May 4, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 109-111

A Brief Account of the More Important Public Collections of American Archæology in the United States

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 111-119

Photodynamic Notes, VIII

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 120-134

Introduction to a Study of the North American Noctuidæ

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 134-176

A Revision of the Lysiopetalidæ, a Family of Chilognath Myriopoda, with a Notice of the Genus Cambala

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 177-197

On the Morphology of the Myriopoda

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 197-209

Stated Meeting, May 18, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 209-210

Stated Meeting, June 16, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 211-212

Stated Meeting, July 20, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 212-213

Stated Meeting, August 17, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 213-214

The Perry County Fault. Note on an Important Correction in the Geological Map of Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 218-225

Note on a Relic of the Native Flora of Pennsylvania, Surviving in Perry County

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 226-230

On the Equivalent of the New York Portage, in Perry County, Middle Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 230-235

Note on the Genus Rensselaeria in the Hamilton Group in Perry Co

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 235-236

Note on a Large Crustacean from the Catskill Group of Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 236-239

Obituary Notice of Henry Seybert

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 241-263

The Zone of Asteroids and the Ring of Saturn

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 263-266

Stated Meeting, October 19, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 280-282

Stated Meeting, Nov. 2, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 282-286

Letter of Leo Lesquereux

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 286-289

Stated Meeting, November 16, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 290-294

Aerial Ships

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 301-303

Detailed Section of Chemung Rocks Exposed in the Gulf Brook Gorge at Le Roy, Bradford County, Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 304-305

Stated Meeting, December 7, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 306-307

On the Distribution of the Loup Fork Formation in New Mexico

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 308-309

Second Addition to the Knowledge of the Puerco Epoch

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 309-324

On the Trituberculate Type of Molar Tooth in the Mammalia

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 324-326

Stated Meeting, December 21, 1883

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 329-330

A Note Respecting the Correct Name of the Last Letter of the English Alphabet

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 330-333

The Microscopic Examination of Timber with Regard to Its Strength. A Contribution from the Eli K. Price Botanical Laboratory of the University of Pennsylvania

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 333-342

Stated Meeting, January 4, 1884

Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 343-344