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Huggins demonstrating his theory. US physical chemist Maurice Loyal Huggins (1897-1981, right) with fellow researcher Delbert D. Reynolds (left), using molecular models to demonstrate his theories. The models are of a silver halide crystal (lower left) and a collagen (a biological polymer). On the blackboard is a formula for an organic polymer. Huggins was a polymer chemist, developing a number of theories to explain their structures. He worked at the Eastman Kodak photographic company from the late 1930s. Silver halide is used in the paper used to produce photographic prints. Photographed in 1958, at Kodak Research Laboratories, Rochester, New York, USA.
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