Mixing ratios of the 485-keV transition in Os 192 and the 296-, 308-, and 604-keV transitions in Pt 192 populated from the decay of Ir 192 were measured using the 7-7 directional-correlation method. In addition, the 468-316-keV, 589-612-keV, 885~316-keV, and 1063-316-keV 7-7 directional correlations in Pt 192 have been remeasured. Coaxial and planar Ge(Li) detectors and Nal(Tl) scintillation detectors were used in different combinations depending on the energy resolution required for a particular measurement. The results for the mixing ratios are 5 48& = + (10.9"i. 5 + 2 -1 ), 5 29 6= -(9.1_i. 7 + 2 -7 ), 5308= -(9.9±1.0), and §6o4-+ (2.0±0.2). The over-all agreement of the signs, as well as the absolute values of the mixing ratios with predictions of the pairing-plus-quadrupole model of Kumar and Baranger, is good.