Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science March 1953

9 show that the separation increases linearly with the pressure It is of course evident from the figures that the intensity of of the components in the doublet also diminishes with increase in pressure of the absorbing vapour but a comparison of figures 7 and 8 clearly shows that at a distance equal to that of the centre of the component observed with the absorption cell at 217°C from the cen [...] This can be clearly seen from a comparison of the ghosts between the principal lines in figures 7 and 8. Since the exposure is the same in both the cases and the components of the doublet in figure 8 appear at the position at which there is no intensity in the incident line the change of frequency of the transmitted line observed in figure 8 is caused by the absorbing vapour. [...] The magnitude of forced convection depends upon the relative velocity the physical properties of the fluid the excess of temperature of the body over that of the fluid and the size and form of the body. [...] It is pointed out that although the results reported by previotr workers indicate the presenee of two rotational isomers even in the case of_normal paraffins in the liquid state and disappearance of one of the rotational isomers with the solidification of the liquids the results observed in the case of T 2 3-trichloropropane do not indicate such disappearance of one of the isomers kith the soli [...] The persistence of all the lines in the case of solid i 2 3-trichloropropane thus shows that the presence of two types of isomers in the liquid state of this compound cannot be assumed to explain the presence of any extra lines in the Ratnan spectrum of this substance.