Nuclear family apparatus

The nuclear family apparatus was designed to provide a living arrangement that included fathers as well as other family members. Accordingly, it required generous dimensions so as not to cramp the males and durable materials that could withstand their strength. The apparatus described in this paper is relatively large, strong, easy to keep clean, and safe in its construction. It provides quarters for four rhesus monkey families—the parents and their offspring. Parents are confined to living cages at the rear and ends, but their young may divide their time between living cages and large play areas equipped with motor apparatus.