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Read November i 6 , 17 dp. 
XL. Ohfervation of a Solar Eclipfe the \th 
of June, 1769, at the Obfervatory at 
Aufthorpe, near Leeds, in the County of 
York. By J. Smeaton, F, R. S, 
h / // 
B eginning by mean time, A. M. 6 33 i 
Middle - - - - - - - 7 26 38 
End ----------8 20 16 
Total duration - -- -- -- 147 15 
Digits eclipfed - -- -- -- 6 46 
N. B. The beginning and end of the eclipfe were 
obferved by an excellent 3.1. feet treble objedl-glafs 
telefcope, conftrudted by Dollond, with the fmallefl: 
magnifier, which enlarged the diameter fomewhat 
above 80 times. As there is no defed: in quantity . 
of light from the Sun, the objed glafs was contraded • 
by an aperture to 2^ inches, and the objed was per-*-'' 
fedly lharp and diftind. , ' 
The quantity was taken by'a parallel wire micro- 
meter, upon an equatoreal apparatus, which rendered 
it very commodious for the purpofe j by which the 
part of the Sun’s diameter, remaining uncclipfed, 
meafured at right angles to a line joining the horns^ 
was 889 fuch parts as the Sun’s diameter, taken the 
fame 
