The mariners magazine, or, Sturmy's mathematical and practical arts containing the description and use of the scale of scales, it being a mathematical ruler, that resolves most mathematical conclusions, and likewise the making and use of the crostaff, quadrant, and the quadrat, nocturnals, and other most useful instruments for all artists and navigators : the art of navigation, resolved geometrically, instrumentally, and by calculation, and by that late excellent invention of logarithms, in the three principal kinds of sailing : with new tables of the longitude and latitude of the most eminent places ... : together with a discourse of the practick part of navigation ..., a new way of surveying land ..., the art of gauging all sorts of vessels ..., the art of dialling by a gnomical scale ... : whereunto is annexed, an abridgment of the penalties and forfeitures, by acts of parliaments appointed, relating to the customs and navigation : also a compendium of fortification, both geometrically and instrumentally / by Capt. Samuel Sturmy.

How to find what Sign the Moon is in more exact; with the Moon's Motion for every day of her Age.

AStronomers divide the Compass of the Heavens into 12 Signs, which they set forth by these Names and Characters, which you must be a little acquainted with, and the place of the Sun in the Zodiack. Each of these Signes you have them as followeth.

A Table shewing the Moon's Motion according to her Age.

D. Age.	S.	D.	M.
1	00	13	11
2	00	26	21
3	01	09	32
4	01	22	42
5	02	05	53
6	02	19	04
7	03	02	04
8	03	15	26
9	03	28	35
10	04	11	46
11	04	24	56
12	05	08	07
13	05	21	18
14	06	04	28
15	06	17	39
16	07	00	49
17	07	14	00
18	07	27	11
19	08	10	21
20	08	23	32
21	09	06	42
22	09	19	53
23	10	03	03
24	10	16	14
25	10	29	25
26	11	12	35
27	11	25	46
28	12	08	56
29	12	22	07
30	13	05	17

First know, That the Sun entreth the first Sign ♈ the 11th of March, ♉ the 11th of April, ♊ the 12th of May, ♋ the 12th of June, ♌ the 14th of July, ♍ the 14th of August, ♎ the 14th of September, ♏ the 14th of October, ♐ the 13th of November, ♑ the 12th of December, ♒ the 11th of January, ♓ the 10th of Fe∣bruary. This known, the place of the Sun is well found, adding for every day past any of these, 1 Degree.

Thus you see, the Sun runs through these 12 Signs but once in a year; The Moon in less than a Month, viz. in 27 days, 7 hours, 43 minutes. Note, That every New-Moon, the Sun and Moon are in one Sign and Degree; but the Moon hath a Motion of about 13 Degrees every day, as is shewed in this Table. Therefore according to the Age of the Moon, add the Signs and Degrees of the Moon's Motion, to the place of the Sun at the New Moon, and so you shall have the Sign and Degree which the Moon is in at any time desired.

Thus for Example, A New-Moon 1665. the 26th. No∣vember, and the Sun and Moon are both in 14 Degrees of ♐. Now upon the 11th of December, the Moon being 14 days old, I would know what Sign the Moon is in. This Table shews, for the 14 days of the Moon's Motion, you must add 6 S, 4 D, 28 Min. to the said 14 Degrees of ♐.

Now counting those 6 Signs upon your Fingers, reckon∣ing the Names of the Signs in order from Sagittarius, ♑ 1, ♒ 2, ♓ 3, ♈ 4, ♉ 5, ♊ 6, it falls upon the Sign Gemini. Lastly, adding the odd 14 Degrees unto the 4 Deg. of the Moon's Motion together, shews the place of the Moon to be in 18 Degrees of Gemini.

There is much use made of the Moon's being in such and such Signs, in Physick and Husbandry, of which I shall say nothing; but give you one Conclusion which much depends hereon; that is,