_Light_, the inconceivable smallness of it’s particles, 165,
and the dreadful mischief they would do if they were larger, 166.
It’s surprising velocity, 166,
compared with the swiftness of the Earth’s annual motion, 197.
Decreases as the square of the distance from the luminous body
increases, 169.
Is refracted in passing through different Mediums, 171-173.
Affords a proof of the Earth’s annual motion, 197, 219.
In what time it comes from the Sun to the Earth, 216,
this explained by a figure, 217.
_Limits_ of Eclipses, 317.
_Line_, of the Nodes, what, 317;
has a retrograde motion, 319.
Of Sines and Chords, how to make, 369.
LONG (Rev. Dr.) his method of comparing the quantity of the surface of
dry land with that of the Sea, 51.
His glass sphere, 126.
_Longitude_, how found, 207-213.
_Lucid Spots_ in the Heavens, 401.
_Lunar Cycle_ deficient, 422.