Original oil and gas trade magazine vintage ad for THE DAVISON CHEMICAL COMPANY of Baltimore, MD. Division of W.R. Grace and Company. Davison M-S High Alumina Catalyst. Shows chart of High Alumina M-S Catalyst Particle Size Distribution. Unique 1955 old petroleum petrochemical refining industry magazine advertisement. On the reverse side is an ad for DE LAVAL STEAM TURBINE COMPANY of Trenton, NJ. DeLaval Centrifugal Blower does a dependable job in the new Model B Orthoflow cat cracker of the British American Oil Company, Ltd. at Clarkson, Ontario. Old 1955 petroleum industry magazine advertisement. Approximate page size 9 x 12 inches.