142 



Days of 



the 

 month. 



July 9 



10 



North 

 lat. 



West 

 long. 



PHYSICAL OBSERVATIONS. 



13° 2' 



52° 58' 



Sea rough. Pretty strong breeze. 







Dip of the magnetic needle, 50*67° ; 







good. 







Oscillations, 234 ; a little doubtful. 



12 34 



— ■ 



54 19 



Fine breeze, very clear sky. 

 Cuanometer , only 16°; color of the 

 sea, 35°. 



Temperature of the air from 17 h to 

 10 h between 24 6 and 23'8o. 



Hygrometer, during this time, be- 

 tween 88' 5° and 90° Saussure. 



11 



11 17 



57 47 



Fine weather, light wind. 



Hours. 

 18 



Centig. 

 therm. 

 242° 



Deluc' s 

 hygrom. 

 60° 



20 



248 



59 



21 



252 



58 3 



23 



250 



59 



0 



252 



585 



2 



26-6 



57 



8 



25 0 



60 



11 



237 



58 



Hygrometer of Saussure constantly 

 between 89° and 90- 7° ; 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. 



