atmospiuchk; dust. 



49 



Table XXXI. (Continued). 



Washed from the 



trunk of an oak 



tree. 



133 



Waphed from 

 poplar leaves. 



Washed from 

 the leaves of a 

 hickory tree. 



Washed from 



the leaves of a 



linden tree. 



Washed from the 

 leaves of an oak 

 tree, June '95. 



.4 



1.0 



G.2 



13.0 



20.1 



30.1 



26.0 



2.5 



tr. • 





Table XXXI 



. (Continued). 









137 



138 139 140 





Washed from the 



leaves of an oak 



tree, May '95. 



Washed from the 

 foliage of trees 

 at La Salle, 111. 



Washed from the From dry leaves 

 leaves of trees at of oak trees, 

 New Bedford, 111. Feb. 1896. 



Average. 







tr. 1 





•4 , 





tr, • 



.1 



.5 





.4 





1 1 



.1 



.5 



1.7 





1.1 





2.5 



1.0 



1.0 





3.0 





4.6 





16.8 1 



17.11 



17.0 1 



20.0 



1 



24.7 



1 



57.2 H 



40.8 ■ 



44.0 ■ 



27.0 



1 



43.4 



■ 



22.0 p 



31. 7 ■ 



32.0 W 



38.5 



1 



21.7 



r 



3.0 f 



8.8 1 



7.3 



r 



9.1 



r 



3.4 





