Original oil and gas trade magazine vintage ad for THE DENISON ENGINEERING COMPANY of Columbus, OH. Have You Met Mr. Pascal? Blaise Pascal said Pressure applied at any point on a fluid in a closed vessel is transmitted undiminished to all parts of that vessel. Today, Pascal's Law is being translated into some of the most ingenious machinery and equipment in the history of industrial development. Denison Equipment in Applied HydrOILics. Unique 1943 WW2 era petroleum industry magazine advertisement. Nice graphics. Woodcut.