PROCE EDINGS 



'-f-tZ/J^ OF THE 



AMERICAN PHILOSOPHICAL SOCIETY 



HELD AT PHILADELPHIA FOR PROMOTING USEFUL KNOWLEDGE. 



Vol. XXXV. • January, 1896. No. 150. 



TABLE OF* CONTENTS. 



PAGE 



Stated Meeting, January 3, 1S98 1 



Stated Meeting, January 17, 1S96 3 



Stated Meeting, February 7, 1S96 6 



Stated Meeting, February 21, 1S96 12 



Adjourned Meeting, I^ebruary 28, .1896 13 



Demonstration of the Rontgen Ray (with one plate) 17 



Remarks by Prof. Goodspeed 17 



Remarks by E. J. Houston . 24 



Remarks by Julius F. Sachse 28 



Remarks by Johii Oarbutt 33 



Remarks by Dr. Wm. Pejyper 34 



Eucalyptus in Algeria and Tunisia, from an hygienic and climalo- 



logical point ot view. By Dr. Edward Pepper 39 



On the Remains of the Foreigners Discovered in Egypt by Mr. 

 Flinders-Petrie, 1895, now in the Museum of the University of 



Pennsylvania (with three plates). By Mrs. Cornelius Stevenson. . 56 

 The Identification of Colored Inks by their Absorption Spectra (with 



one plate). By Charles A. Doremus 71 



Discussion of the Factors of Organic Evolution from the Embryo- 

 logical Standpoint. By Prof. E, G. Conklin 78 



Factors of Organic Evolution from a Botanical Standpoint (the sur- 

 vival of the unlike). By Pi'of. L. H. Bailey 88 



Stated Meeting, March 6, 1896 36 



Stated Meeting, March SO, 1896 65 



Stated Meeting, April 10, 1896 68 



Stated Meeting, April 17, 1896 74 



Stated Meeting, May 1, 1896 76 



It^" It is requested that the receipt of this number be acknowledged. 

 • llt^" In order to secure prompt attention it is requested tliat all corre- 

 spondence be addressed simply " To the {Secretaries of th e American 

 Philosophical Society. 104 S. Fifth St., Philadelphia." 



Published for the Society 



BY 



MacCALLA & COMPANY INC., 



NOS. 237-9 DOCK STREET, PHILADELPHIA. 



