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The first overtone and the second overtone bands of pure CO as well as the first overtone band of CO in solution in the gaseous, liquid, and solid states of N2 and Ar have been studied. The method for obtaining under pressure long lengths of transparent solids is described. A principal band due to C12O16 and a weak satellite due to the isotopes C13O16 and C12O18 have been found, and displacement of the maximum of the principal band and this satellite have been measured. The results are compared with those found for the fundamental by the condensed matrix method. The form of the band, in particular, its half-width, as a function of temperature and density is discussed.

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The thermal conductivity coefficients of water and heavy water of 99.75 % Isotopic purity were measured using a coaxial cylinder apparatus, covering room temperature to their critical temperatures, and pressures from 1 to 500 bar for water, and from 1 to 1000 bar for heavy water. Following the behavior of the thermal conductivity coefficient of water, which shows a maximum close to 135 °C, the thermal conductivity coefficient of heavy water exhibits a maximum near 95 °C and near saturation pressures. This maximum is displaced to higher temperatures when the pressure is increased. Under the same temperature and pressure conditions the thermal conductivity coefficient of heavy water was lower than for water. The pressure effect was similar for water and heavy water. In the temperature range of our experiments, Isotherms of thermal conductivity coefficients were almost linear functions of density.