_B._ You know I have no other cause to assign but some local motion, and that I never approved of any argument drawn from sympathy, influence, substantial forms, or incorporeal effluvia. For I am not, nor am accounted by my antagonists for a witch. But to answer this question, I should describe the globe of the earth greater than it is at B in the first figure, but that the terrella in the fourth figure will serve our turn. For it is but calling B and C the poles of the earth, and D E the diameter of the equinoctial circle, and making D the east, and E the west. And then you must remember that the annual motion of the earth is from west to east, and compounded of a straight and circular motion, so as that every point of it shall describe a small circle from west to east, as is done by the whole globe. And let the circles about _a b c_ be three of those small circles. _A._ Before you go any farther, I pray you show me how I must distinguish east and west in every part of this figure. For wheresoever I am on earth, suppose at London, and see the sun rise suppose in Cancer, is not a straight line from my eye to the sun terminated in the east? _B._ It is not due east, but partly east, partly south. For the earth, being but a point compared to the sun, all the parallels to D E the equator, such as are _e a_, _f b_, _c g_, if they be produced, will fall upon the body of the sun. And therefore A _b_ is north-east; A _a_ east north-east; and A _c_ north north-east. _A._ Proceed now to the cause of attraction. _B._ Suppose now that the internal parts of the loadstone had the same motion with that of the internal parts of the sun which make the annual motion of the earth from west to east, but in a contrary way, for otherwise the loadstone and the iron can never be made to meet. Then set the loadstone at a little distance from the earth, marked with _z_; and the iron marked with _x_ upon the superficies of the earth. Now that which makes _x_ rise to _z_, can be nothing else but air; for nothing touches it but air. And that which makes the air to rise, can be nothing but those small circles made by the parts of the earth, such are at _a b c_, for nothing else touches the air. Seeing then the motion of each point of the loadstone is from east to west in circles, and the motion of each point of the iron from west to east; it follows, that the air between the loadstone and the iron shall be cast off both east and west; and consequently the place left empty, if the iron did not rise up and fill it. Thus you see the cause that maketh the loadstone and the iron to meet. _A._ Hitherto I assent. But why they should meet when some heterogeneous body lies in the air between them, I cannot imagine. And yet I have seen a knife, though within the sheath, attract one end of the needle of a mariner’s compass; and have heard it will do the same though a stone-wall were between.