MAG

MAG

the First. The Reason why it is termed MagnaChart*, was cither for that it contahnl the Sumof all the Liberties of Lngland, or else becausethere was another Charter, called Charta de Fo-resta, cstablilh’d with it, which was the less ofthe two ; or because it contained more than ma-ny other Charters, or more than that of KingHenry the First, or of the great and remarkableSolemnity in the denouncing Excommunication,and direful Anathema’s against the Infringers ofit. ITolinfhcd tells us, That King John, to ap-pease his Barons, yielded to Laws or Articles otGovernment, much like to this Great Charter ;but we have now no ancienter I.aw written thanthis, which was thought to be so beneficial to theSubject, and a Law of so great Equity, in com-parison of those which were formerly in use, thatKing Henry for the granting of it, had the fifteenthPenny of all the Moveable Goods, of both Tempo-iity and Spirituality.

MAGNESIA Opalina, is a kind of Crocus Mc-tallorum, or Liver of Antimony, but of a Red-dcr or more Opaline Colour than the commonone. 'Tis made after the common manner withequal Parts of Antimony, Salt-pcter, and Sea Saltdecrepitated. ’Tis less Emetick than the com-mon one, because the Sea Salt fixes some of theActive Sulphurs of the Antimony and locks themup.

MAGNET or Loadstone, is a Fossile approach-ing to the Nature of Iron Oar, and endowedwith the Property of Attracting Iron, and of bothpointing it self, and also enabling a Needletoucht upon it, and then poised, to point towardsthe Poles of the World.

MAGNET. Stmmius'm his Epistola Invitato-ria Dat. Altorf. 1682. Observes that the At-tractive Quality of the Magnet hath been takennotice of beyond all History. But that it wasour Countryman Bpger Bacon, who first dis-covered the Vcrticity of it, or its Property ofpointing towards the Pole, and this about 400Years since. The Italians first discovered thatit would communicate this Vertuc to Steel orIron. The various Declination of the Needle,under different Meridians, was first discoveredby Sebastian Cabott ; and its Inclination to thenearer Pole by our Countryman stobert Norman.The Variation of the Declination, so that ’tis notalways the fame in one and the fame place, heobserves, was taken notice of but a few Years

turn or conform it self to the other, so as eitherthem would do to the Earth j and that a 1they have so conformed or turned thorniest >they endeavour to approach to join each oust |but if placed in a contrary Position, they a* 011each other. , ,

5. If a Magnet be cut through the Axis, 5Parts or Segments of the Stone which be 3were joined, will now avoid and sty ca .ther.

6. If the Magnet be cut by a Section p cr f e |I £dicular to its Axis, the two Points which bewere conjoined, will become contrary Poles,

in one, the other in the other Segment. .

7. Iron receives virtue from the Mag* ,ctapplication to it, or barely from an apf 11 ® 8 ^near it, tho’ it do not touch it ; and the h'° n ^ceivcs this Virtue variously, according t0 r , cparts of the Stone ’tis made to touch, or > liaapproach to.

8. If an Oblong piece of Iron be any host ^plied to the Stone, it receives Virtue front st

ly as to its length.

9. The Magnet loses none of its own ’ ir Lby communicating any to the Iron, anfi f ,Virtue it can communicate to Iron very speed"! ’tho the longer the Iron touches or joins the 5 t0 ,'the longer will its communicated Virtue h° Jand a better Magnet will communicate m orC

it and sooner, than one not so good.

1 o. That Steel receives Virtue from the N bnet better than Iron.

11. A Needle toucht by a Magnet, willp 1 ^

its Ends the fame way towards the Poles ofWorld, as the Magnet will do it. ,j cS

12. Thar neither Loadstone nor Nff ^

toucht by it, do conform their Poles exactlythose of the World, but have usuallyriarion from them : And this Variation is ‘ - nrent in divers Places, and at divers T» nCS ’the fame Place. c |i

13. That a Loadstone will take upmore Iron when armed or cappt, that) st ^alone: And that tho’ an Iron Ring ° rsuspended by the Loadstone, yet the Mag n ^. oin

hinder that Ring or Kef Q(

before, byand others.

llevclius, Auspiut, Petit, Volckamcr

The Properties, or Pluenomena of this WonderfulStone, as they have been discovered by Gilbert,Kitcher, Cabcus, D. Garter and others, arethese.

1. That in every Magnet there are two Poles,one pointing North the other South; and if aStone be cut or broken into never so many pie-ces, there are these two Poles in each piece.

2. That these Poles in divers parts of theGlobe, are diverfly inclined towards the EarthsCentre.

3. That these Poles, tho’contrary to one ano-ther, do help mutually toward the Magnet’s At-traction and Suspension of Iron.

4. If two Magnets arc Spherical, one will

Particles do notturning round anyleft.

That the

way cither to the

rig*» r

be

14. Thar the force of a Loadstone M 3 !variously cncrcascd or leslened, by the varipu

plication of Iron or another Loadstone to st- ^

15. That a strong Magnet, at the le 3 ^ £0

stance from a lesser or a weaker, cannot ^j^ferit a piece of Iron adhering actually to sue / 1 j Cor weaker Stone ; but if it come to touch 'can draw it from the other: But a weaker ^ snet, or even a little piece of Iron, can u ra away or separate a piece of Iron contiguougreater or stronger Loadstone. , > stic

16. That in our North parts of t he W01 > j.South Pole of a Loadstone will raise up 1

ron than the North Pole. „ ot hcs

17. Thar a Plate of Iron only, hut “'f q() 0 fBody interposed, can impede the Opera ^the Loadstone, either as to its Attract 1 gj a |-rective Quality. Mr. Boyl found it true

fes scaled Hermetically; and Glass is 3impervious as most are, to any Efflut 'i 1 ' pftope1 8. That the Power or Virtue of a A- ‘ ^

1 - . , , , - _ a .

may be impaired by lying long in

state,