OF THE SffN, JUNE 16, 1806". 263 



sion was visible by my telescope. Dr. Maskelyne seems to be 

 of opinion, that rive seconds ought to be allowed tor the time 

 elapsed from the first contact until the impression becomes vi- 

 sible in our telescopes. The atmosphere was remarkably line 

 and serene during the whole time of the eclipse, although the 

 weather was extremely unfavourable for many days both be- 

 fore and after. The limb of the sun was well defined, by a 

 fine circular line, but that of the moon was irregularly indent- 

 ed, more particularly when seen by the, reflector with a power 

 of 200. 



The result is as follows. 



At 



By these the clock was fast for mean time 28" 19, and by 

 a comparison with those of the 12th, the clock loses at the rate 

 of 0" 565 per day, which correction being applied to the 

 observed times of the eclipse per clock, the true results will be 

 as follows. 



On the astronomical 15th of June. Mean time. Apparent time. 



Beginning' of the eclipse at. . 20 1 ' 5' 24" 6 20h 5' 19" 



End of the eclipse. . 22 38 54 67 22 38 47 72 



July 5th. Equal altitudes of the sun's lower limb. 

 A. M. Double altitude P. M. 



bin a )i , » 



At 8 57 26 95 at 3 11 14$ Index error of the 



8 54 morning. 13' 15" 



6 33 Index error of the 



4 12 evening. 13' 30" 



1 50$ 

 cloudy 

 2 57 9J 

 54 48J 



By these the clock was fast for mean time 19" 85, and by 

 a comparison with those of the 18th, the clock loses at the 

 rate of 0" 49 per day. 



M 



