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PROCEEDIJs^GS 



AMERICAN PHILOSOPHICAL SOCIETY, 



BELD AT PBILADELPHIA, FOR PROMOTING OSEFUL KNOWLEDGE. 



Vol. XIX. March to Decembek, 1880. Xo. 107. 

 TABLE OF CONTENTS. 



PAGE. 



Stated Meeting, March 19 1 



Nodal estimate of the Telocity of light. By P. E. Chose 4 



An :i<count of two maps of America, published respectively in 



1550 and 1555. ^y Henry Phillips, Jr 10 



On the action of Hydrochloric acid and of Chlorine on Acetobenzoic 



anhydrite. By W . H. Greene, M.B 13 



Stated Meeting, April 2. 14 



On the origin of planets. By Daniel Kirkicood lo 



Stated Meeting, April 16 16 



Election of new members 17 



Cometary paraboloids. By P. E. Chase 18 



Cosmical determination of Joule's equivalent. By P. E. Chase 20 



Relations of chemical affinity to luminous and cosmical energies. By 



P. E. Chase ". '. 21 



Stated Meeting, Mai/ 7 2o 



Obituary notice of Michel Chevalier. By Moncure Robinson 28 



Second contribution to the history of the Vertebrata of the Permiiin 



of Texas. By E. B. Cope 38 



Stated Meeting, May 21 59 



On cerU\in Tertiary sti-ata of the Great Basin. By E. B. Copt 60 



Some recent discoveries of stone implements in Africa and Asia. By 



Henry Phillijis, Jr 63 



Stated Meeting, June IS 69 



On industrial migrations as shown in the manufactures of Philadel- 

 phia. By Louis Blodget 70 



Of the new dictionary of the English language. By Henry Phillips, 



Jr 74 



Stated Meeting, July 10 75 



On the genera of the Creodonta. "By'E. B. Cope 76 



Stated Meeting, August 20 82 



Notes respecting a reeroded channel way. By /. /. Stere/ison . S4 



Notes cu the geology of AYise, Lee and Scott counties. Viririnia. By 



Joh n J. Sterensoti 88 



Stated Meeting, Sept. 17 107 



Notice of S. S. Haldeman. By /. L. LeConts 109 



Note on a Greco-Egyptian etymology of lacchos. By J. P. LesiUy. . 110 



