372 THE BOTANISTS OF PHILADELPHIA. 



12. "Contributions to tlie History of Dionsea Muscipnla. " — Contribu- 

 tions from the Botanical Laboratory of the University of Pennsylvania, 1 : 7. 



13. "Botanical Gardens and their Value."— .4Zwmm Report of the 

 Philadelphia College of Pharmacy, XXXII, February, 1896, p. 112. 



14. "Irrito Contractility in Plants." — Biological Lectures, Wood's 

 Holl. Session of 1893, p. 185. 



15. "Sensitive Plants under Colored Screens." 



16. "Observations on some^ Hybrids between Drosera filiformis and 

 D. intermedia." — Contributions from the Botanical Laboratory of the University 

 of Pennsylvania, II : 87. 



17. "Proceedings of the Botanical Society of Pennsylvania. — Trans- 

 actions and Proceedings of the Botanical Society of Pennsylvania, I : 111. 



CHARLES SUMNER DOLLEY. 



Charles Sumner Dolley, M. D., was born in Elyria, 

 Lorraine County, Ohio, June 16, 1856. As Professor of 

 Biology in Swarthmore College during 1885 and 1886, and 

 as Professor of Biology in the University of Pennsylvania 

 until 1892, his main work was in zoology. His botanical 

 work was crystallized in a " Provisional List of the Plants 

 of the Bahama Islands," published in Proceedings of the 

 Academy of Natural Sciences of Philadelphia (1889, p. 349). 

 Since 1892 Professor Dolley has taught the biological 

 sciences, particularly botany, in the Philadelphia High 

 School. 



CHARLES S. BOYER.i 



Charles S. Boyer was of German and French parentage, 

 descended from settlers who came to Montgomery County 

 in 1750. His father was a strong Abolitionist, who, as a 

 volunteer in a Pennsylvania regiment, after hard service, 

 died in a Confederate prison. 



He was born in Philadelphia in 1856, was educated in 



