A plain DECLARATION of the vulgar new HEAVEN'S FLATFORM. Serving not only fore this Age, but also fore the future Age of 100 years.  

HEre you are at first to know, that the motion of the Sun and the time do always concur, and therefore is the one the measure of the other. Fore by the Time is to be known the place of the Sun, and again by the Sun's place you may know the Time: therefore you must either know the Time or the place of the Sun, both of them you may easily find in the Heavens-Flatform, do but lay the dial A or B on the desired day of the year and see then what degree the dial doth touch upon the Sodiack, and you will find the thing desired.  

I. EXEMPLE. How to know at any time of the year in what Degree of the Sodiack the Sun is.  
●y Exemple on the first day of May, lay the dial A upon the suid day, and see what degree the dial doth cut upon the Sodiack, you will find it to be the 12th of Taurus being the place of the Sun.   

II. EXEMPLE. How at any time to know the rising and going under of the Sun.  
Suppose it be the 24th. of May, than you must lay the dial on the said day, and see where it cuts the Sodiac, there you must make upon the dial a sign of chalck or any thing else that may easily be rubbed out, which sign demonstrates the Sun, turn then the dial first so long to the East-side of Heaven, till the said sign comes to touch the crombe Horizon, see then without upon what hour and minute the dial doth lie on the hour circle, you will find the Suns rising at 4 a clock in the morning, and if you turn the said point to the Westside of Heaven upon the Horizon, than you will see the dial to lie upon 8 a clock in the evening, being the going under of the Sun, than you will also see that the Sun riseth then 36 degr. 30 minute. from the East to the Northward, and by consequence so manny Degrees and min. less from the West to the Northward.   

III. EXEMPLE. How you may see in the Night by the Stars what time it is,  
Suppose you do but see any acquainted Star to rise or stand in the S. N. E. or Westward, let it be the three Kings arising the first day of October, in the night, and that by it you would knove how late it is; than you must lay the dial A on the said day, and the dial B over the 3 Kings, and give then a sign upon the dial B over the 3 Kings, than you must firmly turn both dials alike to the Eastward, till the said sign upon the dial B doth cut or touch the Horizon, and see then upon what hour and minute the dial A lieth, you'll find it to be 11 a clock in the evening, beingh the right time of the night.    

I. PROBLEM. How you may upon every Poles higth find the rising and going under of the Heaven's lights after you have taken the Poles higth, and the declination or any acquainted Stars.  
You must place one foot of the Compassis in the Centrum of the Heavens-Mirrour, upon the Dial A, and the other downwards, as far as the Degree of the Declination of the Sun or Stars; with this opening of the Compassis you must place the one foot upon the edge-side of the dial A upon the compliment of the Poles higth which you have taken; and slide the dial A towards 6 a clock, (or to the dial B which may be laid along by 6 a clock (or the edge-side of the dial B.) See then how in any degrees the dial A lieth upon the houre-circkle from 6 a clock, which will be the true breadth of the rising and going under of the Sun or Stars.  

I. EXEMPLE.  
Desiring to know on the 21th. of June, where the Sun riseth and goeth under, being beginning of Cancer, on the Poles height of 52 degrees. Then you must place one foot of the Compassis in the Centrum of the dial A, and the other downwards as far as on 23 degr. 30 min. being then the Declination of the Sun; with this opening of the Compassis you must place one foot on the edge-side of the dial A upon the Compliment of the Poles height, being 38 degr. than you must turn the dial A towards 6 a clock, till the other foot of the Compassis comes triangularly to touch the lin. of 6 a clock. See then how many degrees the dial A lieth off from 6 a clock. You'll find it to be very near 40 degr. 20 min. And so far doth the Sun then rise from the E. to the N. upon each Northern breadth of 52 degr. and goeth likewise 40 degr. 20 min. under from the W. to the Northward. And if the Sun be in the first degr. of Capricornus, than it is just the same.   

II. EXEMPLE.  
Desiring to know on the Northern breadth of 50 degr. how many degrees the Southern Ey of the Bul called aldebaran riseth from the E. to the N. Fore the doing of it, you must place one foot of the Compassis in the Centrum, 〈◊〉 the dial A, and the other as far as the Declination of Aldebaran being 16 degrees, with this opening of the Compassis you must place one foot upon the compliment of the Poles height of 40 degrees, on the dial A, than you mus● turn the said dial till the other foot of the Compassis comes triangularly to touch te line of 6 a clock. See then how many degrees the dial A lieth off from 6 a clock, you'll find very near 25 deg. 20. min. And so manny d●g. doth Aldebaran then rise from the E. to the N. it doth also go under 25 deg. 20 min. less from the W. to the N.   

III. EXEMPLE.  
Desiring to know on the Southern breadth of 20 degr. how many degrees the Spica Virgins riseth from the E. 〈◊〉 the S. and that, because the declination of Spica Virgins is Sourhly. You must place one foot of the Compassis in the Centre of the Dial A, and the other downwards as far as on 9 degr. being the declination of Spica Virgins, with this opening you must place one foot of the Dial A upon the compliment of the Poles higth of 70 degrees, than you must turn the Dial A from the E. to the S. till the other foot of the compassis comes triangularly to touch the East line or the line of 6 a clock. See then how many degr. the Dial A lieth off from 6 a clock, you find very near 10 degr. and so far doth S. Virgins from the E. to the S. and goeth like wise so far unter from the W. to the S.    

II. PROBLEM. How to find the rising and going under of the Sun, or of any acquainted Stars, and that upon every Poles higth.  
Place one foot of the Compassis in the centre of the dial B, and the other downward, along by the Edge-side as far as on the degree of the Declination of the Sun or Stars, with this opening of the Compassis you must place one foot on the edge-side of the dial B upon the Compliment of the Poles height, add slide the Dial B from the E. to the N. or S. till the other foot comes triangularly to touch the line of 6 a clock. Then you must see o● what hour and min. the dial B lieth, which is the true time of the Suns rising, which you may also being to the going under.  

I. EXEMPLE.  
Desiring to know the rising of the Sun, on the N. breadth of 25 degr. being the 21th. of June, when the Sun's Declination is Northly 23 degr. 32 min. you must place one foot of the Compassis in the Centrum of the dial B, and open the other foot douwnewards as far as on 23 degr. 32 min. with this opening of the Compassis you must place one foot on the edge-side of the dial B upon the Compliment of the Poles hitgh of 38 degrees, sliding the dial B from the E. to the N. till the other foot of the Compassis comes triangulary to touch the line of 6 a clock. See then upon what hour and min. the dial B lieth on the hour circle, you'll find it to be in the morning at 5 a clock 15 min. being the right ti●● of the Suns rising, the same is in the evening at 8 a clock 15 min. the Suns going under.   

II. EXEMPLE.  
Desiring to know on the Southern breadth of 40 degr. being on the 21 of June, at what time the Sun doth there rise. Then you must place one foot of the Compassis in the Centrum of the dial B, and the other foot downwards, as far as on 23 deg. 30 min. being at the said time the Declination of the Sun, with this opening you must place one foot of the Compassis on the dial B upon the compliment of the Poles higth of 50 degr. and turn the dial B from the E. to the N. till the other foot of the Compassis comes triangularly to touch the East line of 6 a clock, see then upon what hour and min. the dial B lieth, you'll find near enough in the morning 17 hours 30 min. being there the rising of the Sun, the same is its going under in the evening at 4 a clock 35 min.  
Nota. You must know that if you will, use the Heaven's Flatform over the Southside of the Equinoctial Line, than you must take the house contrary to that as they are signed upon the Heaven's Mirror, fore that which is over the North-line 4 a clock in the morning, the same is Southly from the line 8 a clock in the morning, and so is the rest accordingly.   

III. EXEMPLE.  
Desiring to know on the Northern breadth of 40 degrees, being the first of August, what time the great Dog Syrius shall rise. Lay the Dial B over Syrius and the Dial A upon the first of August, than you must place one foot of the compassis upon the Centre of the Dial B, and open the other as far as on 16 degr. 15 min. being the declination of Syrius, with this opening you must place one foot the compassis on the Dial B, upon the compliment of the Poles higth of degrees. Then you must firmly turn both Dial's alike from the E. to the S., till the other foot of the compassis comes triangularly to touch the East line of 6 a clock. See then upon what hour and minutes the Dial lieth, you'll find near enough 4 a clock 42 minutes. Fore to find its going under, you must firmly turn both dials alike from the West to the Southward till the other foot of the compassis comes triangularly to touch the West line of 6 a clock, see then upon what hour and min. the Dial A lieth, you'll find 2 a clock 48 minutes.    

III PROBLEM. How to find at all set times the Declination of the Sun upon the Heaven's mirrorr. Which is indeed very profitable for all Sea men, fore it serves not only fore this present Age, but also fore the future Age of 100 years; when all Books that are made fore that purpose shall be of no worth.  
Fore to find the Declination of the Sun upon the Heavens-Mirrour, you must know that the Sun's place is there set according to the two Jeers, before and after the Leap-year, and that especially upon the future Age, which doth almost differ a whole degree in the Sodiack with this present Age to the year 1700, and in the Sun's Declination in March and September about 24 minutes. So that all Tables of the Sun's Declination which are reckoned out with such a difficult calculation, shall after the year of 1700 be of no use or worth to awny Seaman; because the year of 1700 must be a common year. Desiring then to know the Declination of the ●un upon some certain or set day in this present Age, than you must always lay the dial A one day farther than the set day, and in the second year after the Leap-yeare you must lay the dial upon the midst of the day, but being the third year after the Leap-year, than you must lay the dial A on the first fourth part, being in the Sodiack about 15 min. backward.  
But being the first year after the Leap-yeare, than you must lay the dial upon the third fourth part of the day, being very near 20 min. farther in the Sodiack, then in the third year.  
And when it is a Leap-yeare, than you must lay the dial A upon the beginning of the day, till to the 28 of February; but being after the 28 of February, than you must all the year along lay the dial A upon the end of the day. And if you do truly understand and perform this, than you will at all times know the Declination of the Sun so perfect and exactly, as the Navigation requires. This is the Head thing I have to say of my Heavens-Mirrour.  

I. EXEMPLE.  
Desiring to know the Sun's Declination on the 30th. day of April 1691 or 95 being the third year after the Leap-yeare, than you must lay the dial A upon the first of May, to wit upon the fourth part of the park of that day. See then where the Dial doth cut or touch the Sodiack, you find it to be very near the 10th. degr. 15 min. (being at the ●ame time the true place of the Sun) that is 40 degr. 15 min. of ♈. Farther you must lay the Dial A over the 40 degr. 15 min. off from ♈., in the degrees of the Equinoctial or hour circle, than you must place one foot of the Compassis on the dial A upon the greatest Declination of the Sun, being 23 degrees 32 min. than you must open the other foot of the Compassis towards the Line of 6 a clock, to come triangularly with this opening of the compassis. Then you must place one foot of it in the Centre of the Dial A, and turn the other downwards, and see where it falls, you find it to be very near 14 degrees 55 minutes, being at the said time the Sun's Declination.   

II. EXEMPLE.  
Desiring to know the Sun's Declination on the 30th. of April 1688 or 92. being the first year after the Leap-yeare. Then you must lay the dial A on the first of May, upon the utmost of the days park, see then where the dial A doth cut the Sodiack, you find it to be very near the eleventh degree of Taurus, being the true place of the set time, that is 41 degrees of ♈. Then you must further lay the dial A on 41 degrees of ♈. as before, and place one foot of the Compassis on the dial A upon the greatest Declination of the Sun, being 23 degr. 32 min. than you must open the other foot of the Compassis, till it comes rect-angularly to touch the Line of 6 a clock, with this opening of the Compassis, you must place one foot of it in the Centre of the dial A, and the other you must turn downwards, seeing upon what degree and minute it falls, you'll find it to be very near 15 degr. and 10 min. being at the set time the true Declination of the Sun, differing little or nothing with the wise and artificial calculation, do so at all other times, till to the year of 1700, but after that time you must lay the dial upon the set day, considering that this use is principally (as I told you) practised and form upon the future Age, where upon we shall also give some exemples, which also will serve fore the better understanding of the former.   

III. EXEMPLE.  
Desiring to know the Sun's declination on the 30th day of April 1706. being the second year after the Leap-year. Then you must at the same time lay the Dial upon the middle of the park of the said day, and see where the Dial A doth touch the Sodiack, you'll find it to be very near the 9th degree and 30th minute of Taurus, being at the said time the true-place of the Sun, differing almost a whole degree with the Year of 1686, fore the Sun is 39 degr. 30 minute. of ♈ Than you must further place the Dial A on 39 degrees 30 minutes of ♈. upon the Dial, in the same manner as I told you before, and then you must place one foot of the Compassis on the Dial A upon the greatest declination of the Sun, being 23 degrees 32 min., than you must open the other foot of the Compassis, till it comes triangularly to touch the Line of 6 a clock: with this opening you must place one foot of Compassis in the Centrum of the Dial A, and the other downwards, see then on what degree and minute the foot stands, you'll find it to be very near 14 degrees 42 minutes, which is on the said 30 day of April about noon, the declination of the Sun, differing also in the Sun's declination with the Year of 1686 almost 18 min. So that by this exemple you may see that all Boocks and Tables ●●●●●ning this matter which are formerly made, will altogether be in vain, and of no value, as soon as ever the Year of 1700 begins.   

IV. EXEMPLE.  
Desiring to know the Sun's Declination in the year of 1710. when the Sun is in the 18th. degr. of ♌. Then you must lay the dial A upon the 18 degr. you'll also see that the dial doth then lie on the eleventh day of August, about on the third fourth part of the park of that day, being in the evening about 6 a clock. Then you must further lay the dial A upon the 42th. degree, from ♎. to Cancer upon the hour circle, being on the 18th. degree of ♌, than you must place one foot of the Compassis on the dial A upon 23 degr. 32 min. as before, en than you must open the other foot, rectangularly unto the Line of 6 a clock, with this opening you must place one foot of the Compassis in the Centrum of the dial A, and then you must turn the other foot downwards, and see on what degree and minute it falls, you'll find it to be very near 15 degr. 30 min. being at the said time the Declination of the Sun.    
FINIS.