THE 



LONDON and EDINBURGH 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



♦ 



[THIRD SERIES.] 



SEPTEMBER 1837. 



XXV. Experiments made during a Voyage, and at Bermuda, 

 on the Carbonic Acid in the Atmosphere. By Lieut.-Col. 

 Emmett. Communicated by John Dalton, D. C. L., fyc. 



Notes on Carbonic Acid in the Atmosphere in a Voyage to 

 Bermuda. 





Carbonic acid found in all these trials made. Lime-water 

 was the test. The quantity apparently fluctuated, the film 

 forming at times more rapidly than at other times ; most, ap- 

 parently, at the 29th of April and the 1st of May. 



Experiments made at Bermuda, per quantity. 

 Experiment I . Sept. 25th. A glass receiver of 3920 cubic 

 inches, = 15*5 gallons, was taken to the north side of the 

 island beyond any building. Wind north ; day fine ; thermo- 

 meter 79°. Into this, after well washing with rain water and 

 collecting the air, were put 1500 grain measures of lime-water. 

 The receiver was then well closed with a cork, and set aside. 



Sept. 24, 4^ p.m. ; therm. 82°. Some of the lime-water 

 used was tested: 1500 lime-water taking 410 test sulphuric 

 acid, the liquid would be 1*009 test. It took 330 to saturate 



Third Serifs. Vol.11. No. 67. Sept. 1837. 2G 



