140 



Days of 



the 

 month. 



July 4 



North 

 lat. 



10° 19' 



15 18 



West 

 long. 



39° 19' 



PHYSICAL OBSERVATIONS. 



Thermometer , the whole day, between 

 22° and 23*6° ; hygrometer be- 

 tween 87° and 89 6°, Saussure's 

 division. 



6 



14 57 



42 21 



Sea, 23 0° } air, 22*2°. 

 Variations of the meteorological in- 

 struments : 



44 40 





Centigrade 



Deluc's 



Hours. 



therm. 



hygrom. 



At 23 



21 9° 



612° 



0 



23 2 



615 



2 



234 



600 



3 



234 



61 2 



6 



23 1 



630 



12 



233 



63 4 



Dull and cloudy weather. 



14 20 



Temperature of the ocean, 23*7° ; 



temp, of the air, 22*8°. 



Deluc's 



Therm. 



Hrs. 

 15 



18 



20 



22 



0 



7 



12 



226° 



22 7 

 233 

 231 



23 5 

 236 

 23-5 



hygrom. 

 68'5\ 



665 



655 Dull and 



66-4 J, cloudy 



65*0 weather. 



65 '2 

 66 0 - 



Saussure's hygrometer would have 

 remained between 92 8° and 

 94'4°. 



47 38 In the midst of the ocean between 

 Africa and South America, easter- 



