Here we have our filling plant for liquid nitrogen and we will fill in to our liquid nitrogen. It's the starting point for all our experiments. Here we fill it in a tube and show that liquid nitrogen is not paramagnetic. So the magnets won't hold it. Here we fill the liquid nitrogen in a cup and then we will add a boiling stone which is here so that we have no explosions during the vacuum and now we will pump out the surrounding gas and reach a pressure of 1.2 milli-bar and then the liquid nitrogen gets solid and we reach a temperature of 63. So here you see boiling and suddenly it will freeze if we reach their pressure and we will get solid nitrogen. Here you see solid nitrogen and when we increase the pressure inside again we will move up with the temperature and we'll reach again liquid nitrogen. So we end again our experiment with liquid nitrogen. It will melt. We will see it in two steps. So now we are increasing the pressure and see the ice melting and we increase it even more and now we end up at liquid nitrogen again.