Original oil and gas trade magazine vintage ad for PITTSBURGH-DES MOINES STEEL COMPANY. Material Storage Problem Solved. Our research engineers, and Chemical Storage Fellowship at Mellon Institute for Industrial Research, conduct a continuous program of study on storage problems from many fields, which is translated into better design, material and methods by our fabricating divisions for the customer's benefit. This unique 1950 one-page old petroleum storage equipment magazine advertisement would display beautifully matted and framed.