AND OF PLANTS UPON THE ATMOSPHERE. 
155 
Media through which the light 
was transmitted. 
State of 
the 
weather. 
Proportion between 
the whole quantity 
of gas obtained in 
the two jars. 
Proportion per cent, 
between the oxygen 
and nitrogen in the 
two jars. 
Proportion be- 
tween the oxy- 
gen iu the two 
jars. 
Proportion be- 
tween the nitro- 
gen in the two 
jars. 
Jar 1. Transparent 
Jar 2. No. 2. (Purple) 
Bright 
sunshine, 
with afew 
clouds. 
Jar 1. 100 
Jar 2. 16 
0.46 N. 64 
0.15 N. 85 
100 
5-25 
100 
21-4 
Jar 1. Transparent 
Jar 2. No. 7. Bottle filled with "I 
port -wine / 
Bright 
sunshine. 
Jar 1. 100 
Jar 2. 0 
Jar 1. Transparent 
Jar 2 . No . 6 . Bottle (with am- "1 
monio- sulphate of > 
copper) J 
Bright 
sun, 
though 
with a few 
clouds. 
Jar 1. 100 
Jar 2. 42 
0.33 N. 66 
0. 0 N. 42 
100 
0 
100 
63 
Jar 1. Transparent 
Jar 2. No. 1. Glass (Green) . . 
Bright 
sunshine. 
Jar 1. 100 
Jar 2. 43 
0.46 N. 64 
0.0 N. 43 
100 
0 
100 
67 
The third series undertaken was with common Sea Wrack ( Fucus digitatus), im- 
mersed in water of temperature 65°, and the following- were the results obtained. 
Media through which the light 
was transmitted. 
State of 
the 
weather. 
Proportion between 
the whole quantity 
of gas obtained in 
the two jars. 
Proportion per cent, 
between the oxygen 
and nitrogen in the 
two jars. 
Proportion be- 
tween the oxy- 
gen in the two 
jars. 
Proportion be- 
tween the nitro- 
gen in the two 
jars. 
Jar 1. Transparent glass .... 
Jar 2. No. 5. (Orange) 
Exp. 1. 
Feeble 
sunshine. 
Jar 1. 100 
Jar 2. 31 
0.55-5 N.44-5 
0. 14-2 N.85-8 
100 
7-9 
100 
59 
Exp. 2. 
Bright 
sunshine. 
Jar 1. 100 
Jar 2. 19 - 2 
0. 60 N. 40 
0.44 N. 56 
100 
14 
100 
27 
Jar 1 . Transparent 
Jar 2. No. 4. (Red) 
Bright 
sunshine. 
Jar 1. 100 
Jar 2. 10-8 
0.75 N. 25 
0.46 N. 54 
100 
6-65 
100 
23 
Jar 1. Transparent 
Exp. 1. 
Bright 
sunshine. 
Jar 1. 100 
Jar 2. 13 
0.69 N. 31 
0.31-5 N. 68-5 
100 
6 
100 
28-7 
Jar 2. No. 3. Glass (Blue). . . . 
Dull day. 
Jar 1. 100 
Jar 2. 7-3 
0. not deter- 
mined. 
0.0 N. 7-3 
Jar 1. Transparent 
Jar 2. No. 2. Glass (Purple) . . 
Feeble 
sunshine. 
Jar 1. 100 
Jar 2. 12*5 
0.60 N. 40 
0. 8-8 N. 91-2 
100 
1-8 
100 
28-5 
Jar 1. Transparent 
Jar 2. No. 6. Bottle (contain-*] 
ing a solution of am- l 
monio-sulphate of f 
copper) J 
Bright 
sunshine. 
Jar 1 . 100 
Jar 2. 8 
0.70 N. 30 
0.19 N. 81 
100 
2 
100 
21-7 
Jar 1. Transparent 
Exp. 1. 
Weak 
sunshine. 
Jar 1. 100 
Jar 2. 7"6 
0.40 N. 60 
100 
100 
7-6 
Jar 2. No. 1. (Green) 
Exp. 2. 
Strong 
sunshine. 
Jar 1. 100 
Jar 2. 5‘2 
0.65 N. 35 
100 
100 
5-2 
Bottle IS 
o. 7 wit 
i port wine tried without effect. 
x 2 
