[2]. See his letter read at the Royal Society, December 18th, 1794.
[3]. Their characters are,
| Sun, | Merc. | Venus, | Earth, | Mars, | Jup. | Saturn, | Georgian, |
| ☉ | ☿ | ♀ | ♁ | ♂ | ♃ | ♄ | ♅ |
[4]. The motion of the earth in its orbit is at the rate of 68 thousand miles an hour.
[5]. As the distances of the planets, when marked in miles, are a burthen to the memory, astronomers often express their mean distances in a shorter way, by supposing the distance of the earth from the sun to be divided into ten parts. Mercury may then be estimated at four of such parts from the sun, Venus at seven, the Earth at ten, Mars at fifteen, Jupiter at fifty-two such parts, Saturn at ninety-five, and Georgian 190 parts. See Plate I. Fig. 1.
These are calculated by multiplying the respective distances of the planets by 10, and dividing by 95, the mean distance of the earth from the sun; and may be set off by any scale of equal parts.
[6]. Perhaps with more propriety interior or inward.
[7]. Exterior or outward.