The theoriques of the seuen planets shewing all their diuerse motions, and all other accidents, called passions, thereunto belonging. Now more plainly set forth in our mother tongue by M. Blundeuile, than euer they haue been heretofore in any other tongue whatsoeuer, and that with such pleasant demonstratiue figures, as euery man that hath any skill in arithmeticke, may easily vnderstand the same. ... VVhereunto is added by the said Master Blundeuile, a breefe extract by him made, of Maginus his Theoriques, for the better vnderstanding of the Prutenicall tables, to calculate thereby the diuerse motions of the seuen planets. There is also hereto added, The making, description, and vse, of two most ingenious and necessarie instruments for sea-men ... First inuented by M. Doctor Gilbert ... and now here plainely set downe in our mother tongue by Master Blundeuile.

¶The first figure belonging to the Theorique of the Moone.

[illustration]

You shall find the two Epicicles of the Moone more plainely set downe in the third figure here following.

IN the former figure, the two outermost circles do sig∣nifie the two Eclipticks, as in the Heauen of Mercurie. Next vnto them is another white circle, in which are set the caracters of the head and taile of the Dragon, sig∣nifying the deferent of the Nodes, and in the middle thereof is the circumference of a circle, in which the two Nodes doe continually moue. Next vnto that is a great broad and blacke orbe, signifying the deferent of the Epicicles: in which orbe is a shadowed circle, which representeth the first Epicicle, whose centre is marked with the letter E: and vpon the perpendicular line C B are placed two other little circles, one aboue, and ano∣ther beneath the centre E, both whose centres are mar∣ked with the letter F, and these two little circles beeing white within, doe signifie the second Epicicles. And in the circumference of either of them is set the caracter of the Moone. The point A signifieth the centre of the world, the point B signifieth the Auge of the first Epicicle, and the point C is the opposit Auge of the said first Epicicle.

1. The deferent of the Nodes is an orbe in the The∣orique of the Moone, in which the Nodes doe continu∣ally moue, marked in the former figure with the head and taile of the Dragon, describing the middle circle of the said orbe. This orbe is concentricall, that is, hath one selfe centre with the Zodiake: and the motion of this orbe is regular and equall in respect of the centre of the earth, vpon the axletree and poles of the Zodi∣ake, contrarie to the succession of the signes, and the daily motion thereof is ⁱ ₃· ⁱⁱ ₁₀· ⁱⁱⁱ ₄₇· and in one yeare

mooueth 19 degrees, ⁱ ₁₀· ⁱⁱ _3•° ⁱⁱⁱ ₄₄· and so maketh one entire reuolution in 18 Aegyptian yeares, 223 dayes, 6 houres, ⁱ ₁₂· and by the violence or strength of his motion, he carrieth the other orbes round about with him.

2. The deferent of the Epicicles is the foresaid blacke Orbe in the Theorique of the Moone, in which the E∣picicles of the Moone are carried continually about. And this blacke orbe hath his owne proper motion, which is according to the succession of the signes, and is regular in respect of the centre of the world, marked with the letter A, and mooueth vpon his owne axletree, which cutteth the axletree of the Eclipticke in the point A, the centre of the world, and the poles thereof are al∣wayes no more but fiue degrees from the Eclipticke: whereby it happeneth, that the plane of this Orbe cutteth the plane of the Eclipticke in two points, which are called the Nodes, or the head and taile of the Dra∣gon. For the vnderstanding whereof I haue set downe this other figure next following.