But what it is he knows not.
Will he ever know?
That is Lady Why's concern, and not ours.

Meanwhile he has a right to find out if he can.

But what do you want to ask him next?
What?
Oh! What carbonic acid is.

He can tell you that.

Carbon and oxygen gas.
But what is carbon?
Nobody knows.
Why, here is this stupid Analysis at fault again.
Nay, nay, again.