Original oil and gas trade magazine vintage ad for THE RALPH M. PARSONS COMPANY, was located at 617 South Olive Street, Los Angeles, CA, Engineering and Construction by Parsons. Parsons regularly engineers and constructs complete units for atmospheric or vacuum distillation, catalytic cracking, catalytic reforming, fluid coking, alkylation, poly-merization, desulfurization, lubricant manufacture, product storage and transmission, other process facilities and auxiliaries for the Petroleum Refining Industry. Unique 1955 old petroleum industry refinery equipment magazine advertisement. Approximate size 9 x 12 inches.