THE BOTANISTS OF PHILADELPHIA. 335 



12. "Structure of Asarum Canadense." — American Journal of Phar- 

 macy, 1894, 574. 



13. "Structure of Geranium maculatum. — American Journal of Phar- 

 macy, 1894, 516. 



14. "Structure of Heuchera Americana." — American Journal of Phar- 

 macy, 1894, 467. 



15. " Stucture of Podophyllum . ' ' — American Journal of Pharmacy, 1894, 

 417. 



16. "Structure of our Cherry Barks." — American Journal of Phar- 

 macy, 1895, 435. 



17. "Structure of our Hemlock Barks." — American Journal of Phar- 

 macy, 1895, 356. 



18. "Structure of Veratrum viride." — American Journal of Phar- 

 macy, 1895, 196. 



19. "Structure of Iris." — Amencan Journal of Pharmacy, 1895, 78. 



20. "Some Further Observations on the Structure of Sanguinaria 

 Canadensis." — American Journal of Pharmacy, 1895, 4. 



21. "A Contribution to the knowledge of some North American 

 Conifene. With Professor Henry Trimble." — American Journal of Phar- 

 macy, 1896. Published separately in pamphlet form. 



WILLIAM POWELL WILSON. 



William Powell Wilson, Sc. D., was born October 17, 

 1844, at Oxford, in Oakland County, in the northern wilds of 

 Michigan. His early life was spent on a farm. When about 

 sixteen years of age he was employed in a large agricultural 

 implement manufacturing establishment, starting at the 

 very beginning, and working gradually upward from the 

 moulding room to the more difficult operation of making 

 complex agricultural machinery. During this time, until 

 he was nineteen years of age, Dr. Wilson was self-taught, 

 applying himself assiduously to the studies ordinarily com- 

 prised in a high school course. At nineteen he taught his 

 first district school in Michigan. At twenty he entered the 

 State Agricultural College of Michigan, working his way 

 through that institution for the next two and a half years. 



