From sources of cesium of high specific activity produced in the pile and studied in photographic magnetic spectrometers, nineteen electron conversion lines are observed. These are interpreted to show the existence of eleven gamma-rays, four of which have not been previously reported. Certain K/L ratios are measured and the resolution of the components of the beta-radiation presented. A plausible decay scheme consisting of seven levels in the resultant barium 134 nucleus is offered.By irradiating osmium sources for various periods in the pile and obtaining successive exposures in magnetic spectrometers, it is possible to determine the energy and half-life of each electron conversion-line. Osmium 185 decays by K capture with a half-life of 96 days. Four gamma-rays are associated with this activity. Osmium 191 decays by a 14-hour isomeric transition followed by beta-emission With 15-day half-life. Two gamma-transitions in sequence follow the beta-decay. Osmium 193 is a beta-emitter with a 31-hour half-life. Some eighteen electron conversion lines are observed which indicate the presence of nine gamma-rays, only three of which had been previously observed.