113 



pose than others so far tried because the sources of error are 

 much less. The results invalidate the theory. The poisoning 

 power of the metals tried did not bear a definite relation to the 

 energy required to separate a charge from its ion. The results 

 also strengthen the view that a general law formulating the par- 

 found. It does seem probable, however, that an explanation 

 more potent than the other. This would be a forward step, and 



suits hav 



sugges 





■ H. Pond. 



SOME FEATURES OF THE MOUNTAIN FLORA 



OF THE PHILIPPINES. 

 When one thinks of the Philippines and their vegetation, the 

 irstideais that of a purely tr 



;al public 



d the: 



separates New York from northern Labrador or from the central 

 Bahama Islands ; though as the Philippines are entirely within 

 the tropics, the resulting changes there should be less pronounced 

 than in regions farther from the equator. But there is another 



variation. The Philippines 





na gre 



it ma 



ly hills, although 



none are so high as some 



in Fo 



•mosa o 



n the 



north or Borneo 



on the southwest. The 



highe 





Mi 





southerly of the large islan 



Is, bu 



t the gre 





mass is in Luzon, 



at once the largest and the 



astis 



and ofir 



nport 



ance to the north. 



