144 



Days of 



North 



West 





the 

 month. 



lat. 



long. 



PHYSICAL OBSERVATIONS. 



July 15 



10° 51' 



66° 12' 



Wind north-east, feeble ; fair 5 sea 

 very fine. 



Temperature of the ocean, on the 

 shoal near Punta Araya, 23*4° 5 

 open sea, 25*2° 5 and at five miles 

 distance N. N. E. of the port of 

 Cumana the temperature of the 

 surface of the ocean was only 

 22-2°, though we had no bottom 

 at sixty fathoms depth. Is this 

 cold owing to the current, that 

 comes trom the shoals of the island 

 of Margaretta ? In very narrow 

 seas, for instance in the Baltic, 

 the temperature of the water 

 changes also very suddenly. In 

 the port of Cumana, the water of 

 the sea kept in 1799 and 1800 

 constantly between 25 and 26 de- 

 grees, the temperature at low wa- 

 ter being often 0*8° higher than 

 at high water. 



Temperature of the air, 28*7°. 



Hygrometer, 86° Saussure. 



16 



10 28 



66 30 



Arrived at the port of Cumana. 



