135 



Days of 



the 

 month. 



June 13 



14 



North 

 lat. 



34° 30' 



32 16 



15 



30 36 



West 

 long. 



16° 55 



17 4 



16 54 



PHYSICAL OBSERVATIONS, 



Dip of the magnetic needle, 73*0°, 



found in a dead calm. 

 Magnetic intensity, 234 oscillations. 



To the east of the isle of Madeira^ 

 at forty-five leagues distance ; 

 strong breeze from the west ; sea 

 very rough. 



Temperature of the sea, notwith- 

 standing the height of the waves, 

 17*7° ; temperature of the air, 

 16'8°. 



Dip of the magnetic needle, 71 *90°, 

 somewhat doubtful (latitude 31° 

 46', longitude, 17° 4') . 



Magnetic intensity, 237,very doubtful. 



Fine weather,seaalmost entirely calm. 



Temperature of the water, 18*7% 

 temperature of the air, 20*6°. 



Progressive variations of the hygro- 

 meter and thermometer observed 

 carefully in the shade, and four 

 metres above the surface of the 

 ocean : 



Hours. 

 At 21 J 



Saussure's 

 hygrom. 

 85 3° 



Centigrade 

 therm. 

 21*2° calm. 



22i 



857 



200 little wind. 



23£ 



858 



20- 0 idem. 



<H 



853 



21*4 calm. 



H 



842 



23*7 idem. 





843 



22*5 idem. 





852 



20*0 idem. 



n 



862 



19 8 idem, 



