[ 198 ] 



tity of The air of the lecond iar was put 



the two J r 



airsder-to the tern at four: the refult was 



troyed. > * 



377 1. 91 ; 1.77; 1.65; 2.19 ; 3.23. 

 The air of the third jar was ex- 

 amined between fix and feven ; its 

 teft gave 1.97; 1.93; 1.85; 2.16; 

 38S 3.12. 



28. Two jars, of a gallon each, 

 full of pump-water, were expofed 

 in a very agreeable warm day in 

 the fun at ten in the morning ; 

 each contained two handfuls of 

 willow leaves. 



The air of the firft jar was put 

 to the teft at three in the after- 

 noon; the refult was 1.10 ; 2.09; 

 515 2.08; 2.02; 2.06; 2.97; 3.85. 

 The air of the fecond jar was 

 examined at five o' clock ; it gave 

 by the teft 2.09; 2.1 1; 2.07; 

 535 2.08 ; 2.29^; 2.78; 3.65. 



29. Three 



