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Abstract
A simple and easy to assemble apparatus for the determination of expansion of methylcellulose f ilms is described. The technique involved essentially the projection of the image of the film on to a screen and the measurment of the expansion of the film with time. From statistical analyses of the data obtained for film expansion, the method was found to be reliable. The size, shape and amount of methylcellulose/area of film were considered in the assessment of the technique.