136 



Days of 



the 

 month. 



June 15 



North 

 lat. 



30° 36 



16 



29 18 



West 

 long;. 



16° 54' 



PHYSICAL OBSERVATIONS. 



16 40 



Suns force, 3* 1° 5 thermometer in the 

 shade,20'6°; thermometer exposed 

 to the Sun, 23'7°. 



Between Cape Aguer and the Sal- 

 vage islands, twenty-three leagues 

 east of the latter. Pilot's reckon- 

 ing, compared with the longitudes 

 given by the marine time-keeper, 

 indicates a current setting toward 

 the south-east. 



Fine weather 5 westerly wind, very 

 feeble j near the western coasts of 

 the island, of Lanzerota. 



Temperature of the ocean, 19'3° ; air, 

 180°. 



Cyanometer, 22° (colour of the sea, 

 40°). 



Sun's force, 3*6° j thermometer ex- 

 posed to the Sun, 22*5°. 



Variations of the hygrometer and 

 thermometer, the air being very 

 little agitated. 





Saussure's, 



Centigrade 



Hours. 



hygrora. 



therm. 



21J 



85-3° 



19-5o 



22| 



850 



187 



23J 



84.8 



18'7 



01 



838 



200 



l| 



83-4 



21*2 



21 



833 



218 



31 



835 



22* 5 



41 



835 



2t'2 



51 



838 



21 2 



61 



850 



193 



