56o 



'HILOSOPHICAL TRANSACTIONS. 



[anno 1732. 



Altitudes observed by Mr. Bradley. 



The following altitudes of the sun were observed lying-by near the Spile, 

 Sept. I , before noon, with the wooden instrument backward, the wind con- 

 tinuing to blow hard, as before, at north-east. The instrument when used for 

 the back observation was so adjusted, as to allow for a dip of the visible horizon 

 of 2^' ; consequently that dip being supposed, as before, 34-', there remains 

 only 1' to be accounted for, in computing the height of the sun, which is ac- 

 cordingly subtracted in the the third column from the altitudes found by compu- 

 tation. The watch now appeared to be 9™ 3tf too slow. 



