142 



Days of 



the 

 month. 



July 9 



10 



11 



North 

 lat. 



13° 2 J 



1*2 34 



West 

 long. 



52° 58 



54 19 



11 17 



PHYSICAL OBSERVATIONS. 



57 47 



Sea rough. Pretty strong breeze. 

 Dip of the magnetic needle, 50*67° ; 

 good. 



Oscillations, 234; a little doubtful. 



Fine breeze, very clear sky. 

 Cy ammeter , only 1 6° ; color of the 

 sea, 35°. 



Temperature of the air from 17 h to 

 10 h between 24 6 and 238o. 



Hygrometer, during this time, be- 

 tween 88*5° and 90° Saussure. 



Fine weather, light wind. 



Centig. Deluc' s 



Hours* 

 18 



therm. 

 24 2° 



hygrom. 

 60° 



20 248 59 



21 252 583 

 23 250 59 



0 252 585 



2 266 57 



8 250 60 



11 237 58 



Hygrometer of Saussure constantly 

 between 89° and 90- 7° j on the 

 meridian of Surinam, at 80 leagues 

 distance from the Oroonoko and 

 from Barbadoes ; during the night 

 a little rain and a beautiful lunar 

 rainbow. 



