C 463 3 
experiments and obfervations as have appeared to mfe 
pertinent ; feme of which have been as follows ; viz. 
3. I have obferved the rifing and fetting Sun, near 
the vilible horizon, and near riling grounds elevated 
above the vifible horizon about half a degree, and 
found him to appear largefl when neared to the vifible 
horizon , and particularly a conliderable alteration of 
his appearance in magnitude and light has always ap- 
peared to me, from the time of his being in the ho- 
rizon at riling, to the time of his being a degree or 
two above the horizon, and the contrary at his letting ; 
which property I have endeavoured to receive as a 
prejudice, and an impofition on my fight and judg- 
ment, the ufual reafons for this appearance. 
4. I have alfo obferved, that the Sun near the hori- 
zon appears to put on the figure of a fpheroid, having 
its vertical diameter appearing to the naked eye fhorter 
than the horizontal diameter, and, by meafuring thofe 
diameters in a telefcope, have found the vertical one 
fhorter than the other. 
3. I have made frequent obfervations and compa- 
nions of the apparent magnitude of the Suns difk, 
with obje&s direaiy under him, when he has been 
near the horizon, and with fuch objeas as I have 
found, by meafurement, to be of equal breadth with 
the Sun’s diameter j but, in the fudden tranfition of 
the eye from the Sun to the object, and from the 
objea to the Sun, have always found the Sun to ap- 
pear leaft ; and that when two right lines have been 
imaginarily produced, by the fides of thofe equal 
magnitudes, they have not appeared to keep parallel, 
but to meet beyond the Sun. 
Vol.LII. Ooo 6. From 
