f° te3.. j 
SEOQTION a 
_Experimenis,. foewing the difference 
in. the purity of the dephlogifiicated 
air, which the leaves of the fame 
plant give at different times. 
15. Leaves of an apple-tree ines 
an inverted jar full of water. were 
expofed to the fun-fhine from. ten™%* 
a the: morning till five in the af- 
ternoon; the teft of the air was, 
z Bes 1.68 3° 1.49 5 1.8635. 2-79. 42% 
16. Leaves of the fame tree ex- 
pofed during the fame time in the * 
fun-fhine in a green bottle, 1.82; 
12625 1:71; 2.643 3.64. 396. 
17. The fame leaves,. which 
were employed the day before in ex- 
periment 15, were expofed again 
with frefh pump-water in the fun- 
re) - thine ; _ 
