Safety Class  - Very dangerous (Should only be attempted after
careful training) Required Safety Equipment  - The show
performer: Glasses / Cryogenic gloves - Audience/participants:
None. - One brass tube, 5cm across, 40 cm high. This brass tube
is closed on one end and open on the other. - One cork with two
holes in it which fits on the brass tube - Two glass tubes which
fit into the holes in the cork, 40cm long - Liquid nitrogen - A
stable table Preparation: Stick the glass tubes into the cork.
Make sure the glass tubes stick out about 5 cm above the cork.
Put on safety goggles and cryogenic gloves. Put some water onto
the table, and put the tube in this - with the closed side down.
Pour the liquid nitrogen into the tube. Now put the cork with
the glass tubes down into the brass tube. This will cause a
massive fountain of liquid nitrogen to squirt out of the glass
tubes. The waste product (liquid nitrogen) will evaporate into
the air. - Be sure to always wear gloves and glasses when doing
this experiment -