318 



usual*; but the progress of the horary vari- 



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



Lines. 



9 o'clock 



. Y . #1,. , niAynino' — _ 



in iiie itioniiij^ 



33fi-ft3 



4 



in the evening 



Oi)U vt 



A OA 1 



4 oU . 





**3ivQ2 



LI 



i ne oin oi am oveiiiuci . 





9 o'clock 



in the morning - 





10 - 





337*00 



1 - - 



in the afternoon 



ooo 752 



3 - 





336*25 



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 25th 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. Bonpland 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. 337-01 336-80 337*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. 



