The present investigation was undertaken for the purpose of determining the diffusion coefficients of radioactive zinc in copper and alpha brass single crystals at selected high temperatures. To carry out this program the author designed and constructed various pieces of equipment for the operations required in the investigation;A Bridgman furnace was built for growing single crystals. Approximately half of the runs with this furnace were successful in producing large single crystals of alpha brass. In the remainder of the runs either bicrystals or very coarse-grained polycrystals were produced. (Abstract shortened by UMI.)