1.   He drew three phase electrical diagrams with a less than comprehensive knowledge of the subject in hand.

2.   Experimental data on the influence of temperature and pressure on phase equilibria can be represented by phase diagrams.

3.   Some of the most important features of phase diagrams are shown in the phase diagram of water.

4.   Increase of pressure usually favours the formation of the solid-as we shall see in the carbon dioxide phase diagram below.