THE BOTANISTS OF PHILADELPHIA. 339 



As a teacher, Dr. Wilson always reinforced his lectures 

 by laboratory exercises, conspicuous for the wealth of illus- 

 tration. His methods were modern and his lectures clear 

 and forcible. As a lecturer Dr. Wilson had a pleasant 

 style of address, which at once won the attention of his 

 hearers. As an investigator, Dr. Wilson's methods were 

 exhaustive and painstaking. He never considered a piece 

 of work finished until he had thoroughly worked over the 

 whole subject and the literature. 



Dr. Wilson is a member of the Academy of Natural 

 Sciences of Philadelphia ; of the American Philosophical 

 Society ; of the Pennsylvania Historical Society ; of the 

 Pennsylvania Forestry Association ; of the American 

 Association for the Advancement of Sciences, and other 

 scientific bodies. 



Bibliography. 



1. " tlber intramolekiilare Athmuug, " 1881-1882. Researclies carried 

 on in Pfeffer's Laboratory. 



2. "On the Cause of the Excretion of Water on the Surface of 

 Nectaries." ( Dissertation for Degree) 1881. 



3. " Eespiration in Plants." — American Journal of Science^ 3rd series, 

 XXIII : 423. 



4. "The Production of Aerating Organs on the Roots of Swamp and 

 other Plants." — Proceedings Academy of Natural Sciences, 1889 : 67. 



5. "The Influence of External Conditions on Plant Life. " — Biological 

 Lectures, Wood's Holl, 1893 : 163. 



6. "Summer Schools in Botany." — Unircrsify Extension, 1891 : 108. 



7. " Report of the Board of Trustees for Establishing City :Museums, 

 1894. 



8. "Observations on Epigiea repens, 'L.^'— Contributions to Botanical 

 Laboratory of the University of Pennsylvania, I : 56. Plate. 



9. "Preliminary Observations on the Movements of the Leaves of 

 Melilotus alba L. and other Plants." Assisted by J. M. Greenmau — Contri- 

 butions of Botanical Laboratory of the University of Pennsylvania, I : QQ. With 

 plates. 



