E =aeo< | 
42. A little branch of Ceder of 
Lebanon was placed over night in a 
room under a cylindrical jar of a- 
bout two ounce-meafures; next 
morning the air was much fouled 
by it. One meafure of it with one 
of nitrous air occupied 1.45. 
43. Three jars inverted were 
placed upon difhes in the manner 
as in Exp. 39; Under one was 
placed a potatoe-plant ; under the 
fecond a plant of common zigbr- 
foade; under the third a rat of 
byofcyamus. 
Next morning I found the air of 
all three very much fouled, but that 
of the dyofeyvamus the moft of all. 
In none of them would a candle 
burn. One meafure of the air of 
the potatoe-plant with one of nitrous — 
air occupied £.59 ; oné meafure of 
that of the nigdt. a occupied with 
one 
