Ephemerides sive almanach perpetuus

you ought to elicit.

You will recognize the true motion of the Sun from its Ephemeris in this way. Having recognized your "proposed year" in the manner handed down above, note the number in the Sun's Ephemeris where it is written above. In the column beneath that year number, and under the name of your month, opposite the proposed day occurring on the left side, the true motion of the Sun consists of 6 degrees and 2 minutes, offered to you readily. It belongs to the sign whose character is seen placed immediately above. But these are to be taken simply if no revolution of prior or posterior years has yet been completed. If, however, one or more revolutions have passed, enter the table of solar revolution placed after the lunar Ephemeris with such a number of revolutions, and subtract what appears next to it from the number written in the column of the month opposite the proposed day—namely, the prior number from the prior, and the posterior number, which is that of the minutes, from the posterior—and this is done if that revolution of years is prior. If, however, it is posterior to the root, you will act in the same way we said, by adding. Thus, the true motion of the Sun for the proposed day will emerge.

You will discover the true place of the Moon by no dissimilar reasoning to that which you used for the Sun, from its own Ephemeris for any day. If you look at the "proposed year" found as above, where it is written at the front, beneath it in the column of your month, opposite the proposed day occurring on the same left side, the true motion of the Moon will appear to you in signs, degrees, and minutes. But these, likewise as in the Sun, respond simply as true if no complete revolution has yet passed. For if one or more revolutions have circled, and that was one of prior years, consider the first of the three numbers in the columns, placed at the front on the left, appearing after the 6. For as many units as that contains, join them to the number of your proposed day, and where that number of the day appears in the resulting order of days, subtract from that motion—written directly opposite under the name of the month—the 6 degrees and 2 minutes of the posterior column. If, however, the revolution of years was posterior, subtract similarly the first number appearing after the 6 from the other three numbers not inverted in the front on the right from the number of your proposed day, and add to the motion, as above, next to the resulting day number, the signs, 6 degrees, and the minutes of the posterior column as applied to the column above. And whatever remains in either case will be the true motion of the Moon for the proposed day. And this is done if only the first revolution has passed. For the second and third revolutions, you will proceed by the same paths, except that the first 6 doubles the 6 degrees and the posterior minutes. The third triples it. In the others, returning to the first number of days, one must act proportionally.

You will find the conjunction or opposition of the Moon with the Sun by a similar calculation. If in the year representing your proposed year you find the day of the month marked with the character of a conjunction, namely such as ☌ original: "8", or an opposition, in this way ☍ original: "8". And if the motion of the Moon noted there in signs and degrees corresponds either precisely or nearly with the Sun on that day, or on the day immediately preceding or following, a conjunction or opposition is to happen. Once the day is known, you will elicit the hour in which that conjunction or opposition will be accomplished: subtract the degrees and minutes of the Moon found next to that day from the degrees and minutes of the Sun noted in its Ephemeris next to the same day, and note what remains separately; we call that the "distance." Then take the difference of the two motions written for both the Moon and the Sun for the proposed day, and exit referring to looking up a value in a table where each motion is the daily motion of each; namely, one of the Sun and the other of the Moon. Then subtract this daily motion of the Sun from that daily motion of the Moon, and with that