SYNOPTICAL TABLES.
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| Velocity of Sun in its orbits, miles per year, | 150,000,000 |
| Mean distance from the earth in miles, | 95,000,000 |
| Mean distance from the earth in miles, (Earth's radius = 1), | 23,984 |
| Light of Sun reaches the Earth in | 8m |
| Inclination of axis to ecliptic, | 82° 40′ 0″ |
| Time of passing over one degree of mean longitude, | 24h 20m 58s |
| Eccentricity of orbit (semi-axis major = 1), | .01685 |
| Mean longitude, | 280° 34′ 10″ |
| Longitude of the perigee, | 270° 30′ 5″ |
| Greatest equation of centre, | 1° 55′ 27″ |
| Motion of perigee in a year, | 1′ 1″ |
| Volume (Earth's = 1), | 0.06 |
| Mass (Earth's = 1), | 0.0769 |
| Density (Earth's = 1), | 1.225 |
| Diameter (Earth's = 1), | 0.389 |
| in miles, | 3,200 |
| Diameter apparent mean, | 6″.9 |
| Gravity (Earth's = 1), | 0.48 |
| In one second of time bodies fall, in feet, | 7.07 |
| Period of rotation, | 24h. 5m. 28s. |
| Light and heat received at perihelion (Earth's =1), | 10.58 |
| Light and heat received„ at aphelion, | 4.59 |
| Light and heat received„ at mean distance. | 7.58 |
| Least elongation from Sun, | 16° 12′ |
| Greatest elongation. | 28° 48′ |
| Height of mountain at southern horn in miles. | 12 |
| Height of same (radius of Mercury = 1), | .008 |
| Mean distance from the Sun in miles, | 36,725,000 |
| Mean distance from the sun (Earth's distance =1 | .3870084 |
| Greatest distance (Earth's distance = 1), | .40666927 |
| Least distance (Earth's distance = 1), | .3075041 |
| Eccentricity (semi-major axis = 1), | .2056178 |
| Sidereal revolution in days, | 87.9692824 |
| Synodical revoultion in days, | 115.877 |
