1275.    GUELPÉRINE, N. L., AND NAIDITCH, I. M.  [“I-S” Diagrams for H₂, CO, N₂, N₂+3H₂ and CO+2H₂.]  Chim. et Ind. vol. 34, 1935, pp. 1011-1020, 1279-1288; Chem. Abs., vol. 30, 1936, p. 2064.

       Diagrams are presented for pressures up to 1,000 atm. and temperatures <600°.  They were constructed from experimental data on compression and thermal capacities found in the literature, including the low-temperature and relatively low pressure curves of Keesom and Houthoff for H₂ and N₂.  The diagrams are not absolutely accurate but are sufficiently so for use in synthetic-NH₃, synthetic-MeOH, and oil-cracking industries.