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bright background.
[2] I have found that the stars which are nearest to the horizon
look larger than the others because light falls upon them from a
larger proportion of the solar body than when they are above us; and
having more light from the sun they give more light, and the bodies
which are most luminous appear the largest. As may be seen by the
sun through a mist, and overhead; it appears larger where there is
no mist and diminished through mist. No portion of the luminous body
is ever visible from any spot within the pyramid of pure derived
shadow.
[Footnote: Between lines 1 and 2 there is in the original a large
diagram which does not refer to this text. ]
2
20.
A body on which the solar rays fall between the thin branches of
trees far apart will cast but a single shadow.
[
2] If an opaque body and a luminous one are (both) spherical the
base of the pyramid of rays will bear the same proportion to the
luminous body as the base of the pyramid of shade to the opaque
body.
[
4] When the transmitted shadow is intercepted by a plane surface
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