LIQUID AIR.
Liquefaction of Gases by Northmore--1805, Faraday--1823, Bussy--1824,
Thilorier--1834, and others. Liquefaction of Oxygen, Nitrogen and Air,
by Pictet and Cailletet in 1877. Self-Intensification of Cold by
Siemens in 1857, and Windhausen in 1870. Operations of Dewar,
Wroblewski, and Olszewski. Self-Intensifying Processes of Solvay,
Tripler, Lindé, Hampson, and Ostergren and Berger. Liquid Air
Experiments and Uses.