Preparation of Stereoscopic Red-Green Wall-Diagrams

Abstract

I SUPPOSE that, during the course of teaching most science subjects, there are occasions when students would be able to visualise more quickly what the lecturer is trying to describe if they could be shown the object in three dimensions. Wall-diagrams of the stereogram type and models are all right as far as they go, but they cannot show the relations of internal structures as well as they would if they were stereoscopic and completely transparent. So far as I know, the use of stereoscopic red-green wall-diagrams is rarely resorted to, yet they are extremely efficient and, within limits, are not difficult to produce. The details of the method I have found satisfactory are these: