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SECTION XI. 
Experiments foewing that no part of 
planis improve ordinary air, or 
yield dephlogifticated air, but the 
leaves and the green fialks. 
cy of 92. THE former « experiments 
arsdeywith flowers, roots, and des, are 
already above related. There re- 
main only the green ftalks or 
branches, not yet covered with the 
rough fkin or bark, and the wood 
itfelf, to be examined. 
-¥ put fome green ftalks of a wil- 
low-tree, the leaves being ftripped 
off, in a gallon jar filled with pump- 
water ; the jar was expofed, invert- 
ed, as ordinary, upon a wall in a 
warm fun-fhine during four hours. 
— ee] ‘They 
