[ 145 3 
XXV. Obfervations on the Eclipfe of the 
Sun, April i, 1764: In a Letter to the 
Right Honourable James Earl of Morton, 
Pref R. S. from the Reverend Thomas 
Hornlby, M. A. and Savilian Profejfor 
of Afronomy at Oxford. 
My Lord, 
Read May IO, y Take the liberty to tranfmit to your 
x 7 6 4 * y Lordfhip the following obfervations of 
the great eclipfe of the Sun on the ift of Apiil laft, 
in hopes that your Lordfhip may think them not un- 
worthy of the attention of that learned body, over 
which you prefide. 
On the morning of the ift of April, the heavens 
were fo uncommonly ferene, that I could not but flat- 
ter myfelf with the hopes of a fky very favourable 
to obfervation. But about eight o clock a hazinefs 
began to appear, and feveral clouds to aiife from the 
South-weft, which at fmall intervals deprived us of 
a fight of the Sun ; thefe clouds however went off 
entirely to the North-eaft, and the Sun’s limb appear- 
ed very nicely defined, and without the leaft undu- 
lation, through an excellent refraCting telefcope of 1 2 
feet focus made by Mr. Bird, to which had been ap- 
plied a fyftem of 'eye-glafles flmilar to thofe ufed for 
reflectors, and the ufual aperture of which had been 
Inch. 
contracted to 1, 2. I continued to keep my eye very 
attentively fixed upon that part of the Sun s limb, 
Vol.LIV. U where 
