Page:Gods Glory in the Heavens.djvu/376

Number of mountains higner than Mont Blanc,	28
Length of the range of the Lunar Appenines, in miles,	200
Proportion of surface covered with craters,	3-5ths
Tycho, height in feet,	20,180
Tycho— — — diameter in miles,	54
Tycho— — — longest ray,	1800
Tycho— — — number of bright rays, about	54
Diameter of Mt. Vesuvius in feet,	500
Height of Pico, a bright isolated peak, in feet,	7060
Disc of the Earth, as seen from Moon (Moon's disc = 1),	14
Proportion of the Moon's surface alternately hid and visible,	1-7th
Light of the Moon at mean distance (Sun's = 1) .	1-800000th
Heat of the Moon (heat of a candle at distance of 15 feet = 1),	1-3d
Velocity of projection necessary for a lunar body to reach the Earth, feet, per second.	8200
Distance in miles of Moon's surface under a magnifying power of 1000,	240
A circle of one second in diameter as seen from the Earth, in square miles.	1
Limit of vision in the case of a circle or square,	60″
Limits of vision in an indefinitely extended object,	6″
Magnifying power required to see an embankment, 6 feet broad,	6000
Highest power attained with distinct vision,	2000
Maximum limit of atmosphere (one inch of mercury = 1),	1-45th
Maximum limit of— — — refraction (at surface of earth = 1),	1-1980th
Maximum limit of— — — horizontal refraction at Moon,	1"
Eclipses, annual number, minimum (only solar),	2
Eclipses, annual number.— — — maximum,	7
Eclipses,— — — maximum of annular phase,	12m. 24s.
Eclipses,— — — totality (solar),	7m. 58s.