PHILOSOPHICAL TRANSACTIONS. 



317 



TOL. XI.] 



the eclipse, while Mr. Halley in the mean time measured the lucid parts and the 

 distance of the cusps, with the longer tube. A little before the beginning came 

 Lord Viscount Brouncker, president of the Royal Society, who proved by his 

 own judgment the measure of the sun's diameter, taken with the longer tube. 

 At 7^ 45"" the sun first appeared through the clouds. The observations were a9 

 below. See the type at fig. 1, pi. 10.^ 



O 



1 



2 

 3 



4 

 5 



6 



7 

 8 



9 



10 



Corrected 

 Time. 



m. s. 

 49 o 



53 50 



57 24 

 3 12 



12 40 

 8 17 37 

 8 20 6 



8 27 1 



8 28 1 



8 34 12 



8 39 20 



10 1 O 



10 3 



No eclipse yet. Clouds, 

 The sun emerging from the clouds, the right 

 side appeared eclipsed. 

 2040 =10' 10 



Observed with the longpr 

 Telescope. 



Observed with the 

 Shorter. 



IC. 

 IC. . 

 IC. 

 PL. 



, 2773 = 13 56 

 . 3580= 17 52 

 . 4975 = 24 50 



Sun's dia. 6360 = 31 43 



PL 4565 = 21 46 



PL 4478 = 22 18 



IC 4417 =22 



The sun then hid by clouds, till 



The limb seen through the clouds, appeared 



free from the eclipse. 

 Shining clearer, nothing of the limb was wanting 



PL.. 3198 = 26' 18^' 

 IC.. 2334 =19 13 

 PL . . 2989 = 24 35 

 3850 = 31 40 

 PL.. 2888 =23 57 



AZ.. 2310= 19 O 

 AZ.. 2070= 17 2 



^ 



