﻿— 5^1 — 



Powell, John Wesley. 



Eighth annual report of the U. S. geological survey. — Part. II. — 

 Washington, 1889, — O. 52, 



Powell, John Wesley. 



Thirteenth annual report of the U. S. geological survey to the se- 

 cretari of the interior 1891-92. — Washington, 1893. — O. 23-24-25. 



Poivell, John Wesley. 



Twelvth annual report of the U. S. geological survey to the secre- 

 taryof the interior 1890-91. — Washington, 1891. — O. 21. — O. 22' — K 4. 



Powell, Jolni Wesley. 



Tenth annual report of the U. S. geological survey to the secretary 

 of the interior 1888-89. — Washington, 1890. — O. 20-20 a. — R. 7. 



Powell, John Wesley. 



Thirteenth annual report of the U. S. geological survey to the se- 

 cretary of the interior 1892-93. — Washington, 1893.— O. 26-27. 



Powell, Johi Wesley. 



Eleventh annual report of the U. S. geological survey to the secre- 

 tary of the interior 1889-90. — Washington, 1891. — O. 55. 



Poivell, John Wesley. 



Fourth annual report of the U. S. geological sur\ey. — i vol. — 

 Washington, 1884. — O. 19. 



Powell, Jo/m Wesley. 



Tifteenth annual report of the U. S. geological surve\' to the secre- 

 tary of the interior. — Washington, 1895. — T. 5 (180). 



Powell, J. W. 



^^^ annual report of the U. S. Geological Sur\e\- to the secretary 

 of the interior 1886-87. — ^^rt. I.— Washington, 1889. — K. 12. 



Power, Frederik B. 



The chemistry of ide bark of Robinia pseudacacia. — Londoii, 1901. 

 — S. 201. 



