Hi:

I would like to know if everybody knows the next effect.

You show a bottle made of glass and a balloon. You put the balloon in the bottle, holding the mouthpiece of the balloon in that of the bottle and you start inflating it. When you have ended, you cover the mouth of the bottle in order that it does not go flat.

After that you say whatever you want, and you remove the hand from the mouth of the bottle and magically the balloon does not go flat. Even you introduce a pencil to show that nothing covers the mouth of the balloon.

Then you overturn the bottle on a glass, and the globe goes flat slowly. You are able to give the bottle and the balloon for examination.

I want to know if someone knows this effect, overcoat for knowing of whom it was the idea, or if someone sells it commercially. Because I know the secret, but I would like to know the version of the creator, the improvements for this trick, etc.

All the best magic,

Pablo Tejero

I recently saw this old chestnut advertised somewher but for the life of me I don't remember where. I will wager thst it's creator is lost to the mists of time and I first ran across it years ago in a Science demonstration book. It relies on a basic law of physics and you could build one for yourself for under a dollar I'd wager.

Pablo, the effect is called Professor putter's air has weight.I found a sourse on the web http://www.merlinskingdom.com/Tricks/Tri......ment.htm

Thanks to all of you. I knew that the effect was very old and it was easy to build, but I was looking for ideas to perform it.

Thanks for your replies.

All the best magic,

Pablo Tejero