Lecture

 1 I  |   the ball falls toward the centre, and then rising again to
 2 I  | arrived at what we call the centre of gravity of the earth,
 3 I  |    that point they call the centre of gravity; it is not at
 4 I  |    rather a short one - the centre of gravity. Now suppose
 5 I  | that upon the awl, then the centre of gravity of both the pasteboard
 6 I  | near as they can get to the centre of the earth; that is to
 7 I  |  and we shall find that the centre of gravity is somewhere
 8 I  |      at the point C] is the centre of gravity, - there where
 9 I  | know at once that it is the centre of gravity - that point
10 I  |    arrangement by which the centre of gravity is at the lowest
11 I  |    that I am lifting up the centre of gravity (a), and raising
12 I  |     point exactly under the centre of gravity, or it will fall
13 I  |  inside, I have lowered the centre of gravity, and now she
14 I  |     leaf and hang it in the centre of a bottle so that the
15 II | power of gravitation to the centre of the earth.~I must not,
16 II |    fails. Now I have here a centre of power which I will not
17 III|     the red-hot iron in the centre of the block of ice]. You
18 V  |    have a very easily moved centre; and if I take this lath
19 V  |  see I am searching for the centre of gravity of this lath;
20 V  | have broken out of the very centre of the bar, and you will