Historical introduction -- General technique -- The measurement of high pressure -- Special sorts of rupture peculiar to high presures -- P-V-T relations in fluids -- Compressibility of solids -- Melting phenomena under pressure -- Polymorphic transition under pressure -- Electral resistnace of metals and solids -- Effect of pressure on thermo-electric properties -- Thermal conductivity under pressure -- Visocsity -- Miscellaneous effects of pressure.