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day_n moon_n noon_n quarter_n 4,928 5 10.4162 5 false
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ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A16195 Astrolabium vranicum generale A necessary and pleasaunt solace and recreation for nauigators in their long iorneying, containing the vse of an instrument or generall astrolabe: newly for them deuised by the author, to bring them skilfully acquainted with all the planets starres, and constellacions of the heauens ... In which, agreeable to the hipothesis of Nicolaus Copernicus, the starry firmament is appointed perpetually fixed and the earth and his horizons continually mouing from west towards the east once about euery 24 houres. Fraught also by new deuise with all such necessary supplements for iudiciall astrology, as Alkabitius & Claudius Dariottus haue deliuered by their tables. Wherevnto for their further delight he hath anexed another inuention, expressing in one face the whole globe terrestriall; with the two great english voyages lately performed round about the world. Compyled by Iohn Blagraue of Reading Gentleman, the same wellwiller to the mathematicks. Anno. 1596. Blagrave, John, d. 1611. 1596 (1596) STC 3117; ESTC S104607 40,102 66

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in ♍ hir latit 1 degr 47 min. North ♄ 1 degr 56 min. in ♎ ♃ 10 degr 24 min. in ♊ ♐ 4 degr 10 min. in ♋ ♀ 16 degr 46 min. in ♉ ☿ 28 degr 32 min. in ♓ ☊ 5 degr 54 min. in ♓ as for their latitudes they alter little or nothing in 6 or 7 dayes and to those places accordingly sought in this Astrolabe you shall set the petty Apices of each Carect There shall they serue you for all that weeke to singuler effects and presently you may note thus much that if the petty Apex happen to be thus placed in sequens of the Zodiacke from the chiefe Apex then be sure the Planet is direct if in precedens as in ☿ then is he Retrograde if iust one vppon another then Stationary And full easy will it be to imagin the spaces betweene the two Apices of each Planets carect into seuen equall partes for the seuen dayes of the weeke included betweene them as in the 2. Cap. you imagined the Squares into fiue partes and so reddily to conceiue where each Planet is any of those seuen dayes which in none of them can exceede twise 7 Degrees the Moone excepted whose gate in common accoumpt is euery two houres one whole Degree and euery foure and twenty houres twelue Degrees Wherefore for her eyther you must relye vppon your Almanacke or haue foure single Carects at the least to be set two dayes in sunder apeece that is to saye the one to bee set at the Moones place for Sunday noone for Astronomers alwayes begin their day at noone because the Meridian is Horizon rectus the second to be set for Tewsday noone the third for Thursday noone and the fourth for Saterday noone and so by adding or subducting of 12 degrees for a day and two degrees for an houre her place shall sufficiently well be had Her motion is very swift and her Prosthapheresis or Aequacions caused by her epicicles may happily breede error of 7 or 8 degrees in one weeke from that common accoumpt of two houres to a degree otherwise two Carects might haue sufficed but in two dayes her greatest gate being but 12 degrees either before or behinde one of the carects can breede no error to be regarded if you recken it from that carect vnto which she is neerest Cap. 5. ¶ How by this new Astrolabe to finde the true place of the Sunne perpetually IN my Organum Vranicum shortly like to come foorth you shall haue the Kalender of the yere the Cicle of the Sunne and all such necessary supplements And therefore in this Astrolabe which I do appoint to be alwayes anexed thereunto and to be but the back side or Dorsum Vranici I haue framed no Kalender at all or Theoricke of the ☉ as commonly all other Astrolabes haue Yet to serue the turne vntill the Vranicum come foorth or for them that would content themselues without the other as happily some will in regard of the charge of the other which can not well be framed but of mettall I haue in the 12 Signes of the Zodiackes Orbs placed the 12 letters of the 12 Moneths vz. I for Ianuary F for February c. at such degree and minute of the-clipticke as they doe make their entraunce the Radicall yeare of my sayd Vranicum being the yeare after Christ 1600. by help of which you shall for euer it you will finde the true place of the Sunne within 3 or 4 minutes so you regard but three obseruaunces which I shall heere deliuer you The first is concerning the Leape yeare and is remedied by rebating some quarter of a degree for euery yeare following the Leape yeare till it be Leape yeare againe The second is concerning the fiue odde dayes in the yeare aboue 360. and is remedied by rebating for euery day of the moneth proposed but one minute The third is concerning ages past or to come the remedie whereof I will shew in the end of this Cap. Now therefore for the time present vz. for some 20 yeares if neede be before or behinde the yeare 1600. it serueth fitly as it is vpon euery Leape yeare because his roote 1600 is a Leape yeare without any obseruacion more then for the fiue odde dayes which is generall in euery yeare and for any common yeare with very little trouble as I shall shewe in this manner Wherefore if you will know what degree and minute the Sunne is in vpon any day and yeare assigned First seeke by the Zodiacke for the letter of the Moneth in which your day is vz. For the letter I seruing for Iune which is placed at the 20 degree and somewhat more in ♊ and the number 6 ascribed thereto signifieth 6 minutes more then the 20 degrees the exact place of that letter I. And from that letter vz. I number forwards so many degrees of the Clipticke as your day the 8 of Iune proposed is within your moneth Iune proposed rebating so many minutes according to the second obseruaunce before mentioned vz. for your 8 dayes recken 8 degrees in sequens of that 20 deg 6 min. of ♊ lacking 8 min. and where that accoumpt falleth out which you shall finde vppon that reckning and rebating of 8 minutes to be 27 degrees 58 minutes of ♊ there shall be the true place of the ☉ if it be a Leape yeare as this yeare 1596 is and there vz. at the saide 27 degrees 58 minutes of ♊ you may place the Carect of the Sunne for that day as in the last Chapter is taught But if it shall be the first yeare after the Leape yeare then shall you rebate a quarter of a degree or 14 ⅓ min. if you will be precise if the second yeare then rebate halfe a degree if the third rebate ¾ of a degree and then euery Leape yeare it returneth to his owne place againe And this for almost twenty yeares eyther before or behinde the Radicall yeare 1600 shall serue passing well and reddye within some foure or fiue minutes but for any time after the yeare 1600 you shall neede but adde and for any time before subtract some halfe quarter of a Degree or 8 ¾ minutes if you will be precise for euery 20 yeares As for Example for the place of the ☉ the 8 day of March in the yeare 1700. because betweene the yeare 1600 and 1700 there are fiue times 20 yeares therefore I adde fiue diquarters of a degree or to be precise fiue times 8 ¾ minutes which maketh 44 ¾ minutes vnto the foresaid 27 degr 58 min. in ♊ and it maketh 28 degrees 42 ¾ minutes which is the true place of the ☉ on the 8 day of Iune Anno. 1700. And because you shall worke the more certaine I haue to euery of the 12 letters of the moneths set the number of the minutes of that degree where his right place should be which place is also descryed by a little stroke or string cutting the true place of the same Degree and