The sun and the rain, I suppose.
Do you remember, when we got tired of the old slab hut, and set about building this brick cottage, that you noticed it getting higher and higher every day!
Yes, that was because more bricks and wood were used.
Then, if your tree increases in size, there surely must be something added on continually: do you think the sun and rain do this?
Well, I never thought about it, father; but I should like to know why it does grow.
Can you tell me, Willie, what a plum pudding is made of?
Yes, that I can. There is the flour, the suet, the raisins, and the cold water. All these are mixed together.
Then let us see of what our rose tree is made.
I don’t think it so easy to tell that as to reckon up the articles in a pudding.
Never mind, we will try. First, there is the stalk, or woody part. When you put a piece of stick in the fire, what becomes of it?