Answer:
Iron roof, glass walls, burns and burns and never falls.
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
In the evening I'm long, in the morning I'm small; When seen in a ballroom, I'm nothing at all.
Reaching stiffly for the sky, I bare my fingers when its cold. In warmth I wear an emerald glove and in between I dress in gold.
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams dreamt, my merest touch brings laughter.
I met a man on the London bridge, he tipped his hat and drew his name, in this riddle I told you his name. What is it?