GO 
III. On the Amount of Carbon Dioxide in the Air of Sea 
Coast Places, 
Thorpe (Chem. Soc. J. [2] v. 189) has shown that the air 
over the ocean contains less carbon dioxide them air over 
the land, the mean numbers being 3 '0 and 4'04 vols. per 
10,000 of air respectively. 
During the long vacation I interested myself with a few 
experiments upon the air of the sea coast with a view to 
determine whether it inclined, as regards carbon* dioxide, to 
sea air or to land air. 
The samples of air were collected at A rdrossan, a small 
town on the firth of Clyde, where the liver is almost entirely 
merged in the open sea. 
The estimations were conducted in accordance with Pet- 
tenkofer’s method. 
1 
Date, 
1875. 
Weatter. 
Place and Time, j 
Temp. 
Barom. 
Wind. 
Vols. of 
CO 2 per 
10,000 of 
air. 
Aug 2. 
Fine but cloudy. 
In boat, i mile; 
from shore j 12 
noon. 
36°-5 
7 67 mm. 
Why S 
3-87 
» 4. 
Clear, cloudless 
1 sky. Sunset. 
On shore, 8 p.m. 
2V 
760mm. 
W byN 
3*88 
» 14. 
Fine, fresb breeze 
200 yards from 
shore, 3 p.m. 
2r 
760mm. 
SW 
3-34 
„ 18. 
Fine, very clear ; 
very heavy rain 
during preced- 
ing night. 
On shore, 8.30 
a.m. 
16“ 
750mm. 
my 
3-40 
„ 21. 
Fine, very clear ; 
rain during 
morning. 
In boat, i mile 
from shore, 2. 30 
p.m. 
17’-5 
767mm. 
my 
3-84 
Sept. 3. 
Fine, shoAvers 
during preced- 
ing days. 
300 yards from 
shore. 
16“ 
! 
' 759mm. 
! 
NW 
4-01 
Mean=3’72 vols. CO -2 per 10,000 of air. 
The air of such a place as Ardrossa-n, although it be situ- 
ated almost in the open sea, is not therefore influenced by 
the sea, so far as the carbon dioxide is concerned, but con- 
tains almost the same amount of that gas as is found in land 
air. 
