Sir Isaac Newton, some will tell you, found out the great law of gravitation, which holds true of all the suns and stars in heaven, by watching an apple fall: and even if he did not find it out so, he found it out, we know, by careful thinking over the plain and commonplace fact, that things have weight.

So do you be humble and patient, and watch Madam How at work on little things.

For that is the way to see her at work upon all space and time.
What?
you have a question more to ask?
Oh! I talked about Madam How lifting up Hartford Bridge Flat.

How could she do that?
My dear child, that is a long story, and I must tell it you some other time.

Meanwhile, did you ever see the lid of a kettle rise up and shake when the water inside boiled?
Of course; and of course, too, remember that Madam How must have done it.