41 
2. That the sea in our latitudes does not act in increasing 
the amount of carbonic acid in the air above the ocean, as 
found by Lewy over the Atlantic near the equator. 
3. That the differences observed in the air of night and day 
by Lewy on the Atlantic, are not perceptible in the air above 
the Irish Sea. 
4. That in the month of August 1865, the mean quantity 
of carbonic acid in the atmosphere of the Irish Sea was 3*08 
in 10,000 volumes of air. 
In conclusion, I beg to acknowledge the kind attention 
which I received from Captain Temple, and from his crew 
during my stay on board his ship. 
