& 
THE 
QUARTERLY JOURNAL, 
July, 1824. 
Art. I. On the Horary Oscillations of the Barometer, By 
J. Frederic Daniell, F.R.S. 
Havine haa occasion, some time ago, to inquire into the facts 
regarding the daily periodical fluctuations of the barometer, I was 
greatly struck, not only with the regularity of their occurrence, but 
with their gradual decrease in proceeding from the equator towards 
the poles, as shewn by the experiments of different observers. The 
following table constructed from the best authorities, places this 
circumstance in a striking point of view. 
‘ TABLE I. 
Mean Periodical Movement of the Barometer, at different Latitudes. 
North Dintiende) Mean periodical move- 
‘i ier 
Namésiof ‘Places, ment of the Barometer 
St.Thomas’. ...| 0.24 | 0.074 inch 
Sierra Leone 8.29 0.073 
Trinidad... ... . | 10.39 0.063 
Jamaica ......| 17.56 | 0,058 
Clermont-Ferrand . | 45°47 0.039 
oS Por 48,50 0.028 
i §1,.31 0.015 
Vou, XVII. P 
