318 



usual*; but the progress of the horary vari- 



* The 4th of November, 1799 - - Barometer. 



Lines. 



9 o'clock 



in the morning - 



336 83 



4 , - 



in the evening 



33604 



4 30'. - 



_ 



335 92 



11 



The 5th of November. 



336-42 



9 o'clock 



in the morning - 



387 02 



10 - 





337 00 



1 - - 



in the afternoon 



336-72 



3 - 





33625 



4 - 





33620 



4 30' 





336 52 



11 - 





33686 



The 6th of November. 



1 in the morning - 336*32 

 4 30' - - - - - 336-28 

 The 18th of August I was struck at finding the absolute 

 height of the barometer a little less than usual. There were 

 that day eleven strong shocks of an earthquake at Carupano, 

 22 leagues east from Cumana. On the 25tb a small shock 

 was felt at Cumana, and the barometric height was the same 

 as usual. During these two phenomena, the atmospheric 

 tides were equally regular ; only on the 25th of August their 

 magnitude was much less considerable. I shall insert the 

 three observations made by Mr. Bonplaud and myself in 

 each day. 



9 in the morn. 4 30' in the aftern. 11 at night 



August 18th. 336-85 335*92 336 75 



25th. 337*01 336-80 387 00 



26th. 337*50 336*42 337 10 



27th. 33718 336 61 336-87 



These examples confirm what I have said above on the inva- 

 riability of the atmospheric tides during the shocks. See 

 Chap, iv, Vol. ii, p. 224. 



