IRON.
Its proved that Iron consists of parts more subtil, pure and compact than the Magner. 370
JUPITER.
Jupiter and Saturn do encompasse the Earth, and the Sun. 258
Jupiter augments lesse by Irradiation, than the Dog­Star. 305
K
KEPLER.
The Argument of Kepler in favour of Coper­nicus. 242
An Explanation of the true Sense of Kepler, and his Defence. 243
The feigned Answer of Kepler couched in an Artificial Irony. 244
Kepler is, with respect, blamed. 422
Keplers reconciling of Scripture Texts whith the Copernican Hypothesis. 461
KNOW, &c.
The having a perfect Knowledge of nothing, maketh some beleeve they understand all things. 84
Gods manner of Knowing different from that of Man. 87
The great Felicity for which they are to be en­vied, who perswade themselves that they Know every thing. 164
Our Knowledge is a kind of Reminiscence, ac­cording to Plato. 169
L
LIGHT.
Light reflected from the Earth into the Moon. 52
The Reflex Light of uneven Bodies is more uni­versal than that of the smooth, and why. 62
The more rough Superficies make greater Re­flection of Light than the lesse rough 65
Perpendicular Rays of Light illuminate more than the Oblique, and why. 65
The more Oblique Rays of Light illuminate lesse, and why, 65
Light or Luminous Bodies appear the brighter in an Obscure Ambient. 74
LINE.
The Right Line and Circumference of an infi­nite Circle are the same thing. 342
LAWYERS.
Contentious Lawyers that are retained in an ill Cause, keep close to some expression fallen from the adverse party at unawares. 324
LOOKING­GLASSES.
Flat Looking­Glasses cast forth their Reflection to­wards but one place, but the Spherical eve­ry way. 39
LYNCEAN.
The Lyncean Academick the first Discoverer of the Solar spots, and all the other Celestial Novelties. 312
The History of his proceedings for a long time, about the Observation of the Solar Spots. 312
M
MAGNET.
Many properties in the Magnet. 367
The Magnet armed takes up more Iron, than when unarmed. 369
The true cause of the Multiplication of Vertue in the Magnet, by means of the Arming. 370
A sensible proof of the Impurity of the Mag­net. 371
The several Natural Motions of the Mag­net. 374
Philosophers are forced to confesse that the Magnet is compounded of Celestial Substan­ces, and of Elementary. 375
The Error of those who call the Magnet a mixt Body, and the Terrestrial Globe, a simple Body. 375
An improbable Effect admired by Gilbertus in the Magnet. 376
MAGNETICK Philosophy.
The Magnetick Philosophy of William Gilbert. 364
MAGNITUDE.
The Magnitude of the Orbs and the Velocity of the Motions of Planets answer proporti­