The theory of conducting trials of apparent digestibility is simple but the practical side is expensive and requires well-trained staff. In Uganda there is a very pronounced shortage of skilled technical staff and, because of this, equipment used must be as simple as possible to avoid errors of handling and analysis of herbage and faeces. The series of investigations carried out by the authors was planned to simplify the techniques and equipment used without decreasing accuracy to any significant extent. This paper deals with the simplified apparatus which was finally used.