Nahon, N. S. 1968. A device and techniques for the atraumatic handling of the sub-human primate. Laboratory Animal Care [Laboratory Animal Science] 18, 486-487.

Previously, the animals were netted or were restrained by a collar and chain. ... Both of these widely used system, through conditioning response and association, teach the primate fear. At the sight of a net or advancement toward his chain, the primate usually reacts by running about his cage or pulling at his chain frantically, which makes capture and handling difficult. The pole-and-collar system and a simple training technique is described. Patience is important during the critical learning and conditioning period and care must be taken not to cause fear or mistrust. .. The primate is given his reward when he comes to the front of his cage. The device is then hooked to the collared ring.