Scale: Unknown. Sectional model depicting the method of forming a knee from straight timber. The model has been made from two pieces of wood, nailed together and stained a uniform colour. The longer piece of wood has been cut along part of its length to facilitate the forming of the knees curvature and has an illegible paper label applied to it. The shorter piece of wood has an illegible hand written label nailed to it. On the concave face of the longer piece of wood a screw hole has been filled with red coloured substance.