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Substitute materials. Glass utensils. A deep dish glass baking dish of the type shown here makes layers so big that two suffice for a good-sized cake. A glass saucepan for preparing the ingrediants and a glass plate for holding the cake show the utility of glass as a substitute for strategic materials. Sourced from the Library of Congress.

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Substitute materials. Glass utensils. A deep dish glass baking dish of the type shown here makes layers so big that two suffice for a good-sized cake. A glass saucepan for preparing the ingrediants and a glass plate for holding the cake show the utility of glass as a substitute for strategic materials. Sourced from the Library of Congress.

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