136 



Days of 



the 

 month. 



June 15 



North 

 lat. 



30° 36 



16 



29 18 



West 

 long. 



16° 54' 



16 40 



PHYSICAL OBSERVATIONS. 



Suns force, 3* i ° ; thermometer in the 

 shade,20'6°; thermometer exposed 

 to the Sun, 237°. 



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 ; westerly wind, very 

 feeble ; 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° f thermometer ex- 

 posed to the Sun, 22 5°. 



Variations of the hygrometer and 

 thermometer, the air being very 

 little agitated. 



Hours. 



Saussure's 

 hygrom. 



Centigrade 

 therm. 



214 



858° 



19-5* 



22i 



850 



187 



231 



84.8 



18-7 



o| 



838 



20 0 



11 



83-4 



21-2 



21 



833 



21 8 



31 



835 



225 



41 



835 



2L2 



H 



83-8 



21 2 



61 



85*0 



19 a 



