The Dielectric Constant and the Electric Moment of CO, COS, CS2, andH2S

By the heterodyne null method used in previous investigations measurements of the temperature variation of the dielectric constant were made on a further series of gases. The results are very well interpreted by the Debye equation $(\epsilon -1)vT=AT+B$. The values for $A$ are 0.000670 (CO), 0.002798 (C${\mathrm{S}}_2$), 0.001970 (COS), and 0.001223 (${\mathrm{H}}_2$S); and for $B$, 0.0078 (CO), 0.089 (C${\mathrm{S}}_2$), 0.352 (COS), and 0.722 (${\mathrm{H}}_2$S). These values of $B$ give for the electric moment in c.g.s. e.s. unitx×${10}^{18}$:0.10 (CO), 0.326 (C${\mathrm{S}}_2$), 0.650 (COS), and 0.931 (${\mathrm{H}}_2$S). A comparison of all measurements made on the same apparatus with those of other observers is made, and a discussion of the notable discrepancies in this field is given. As a result of this investigation it seems likely that C${\mathrm{S}}_2$ and COS have a rectilinear structure like that of C${\mathrm{O}}_2$.