Original oil and gas trade magazine vintage ad for HALLIBURTON OIL WELL CEMENTING COMPANY of Duncan, OK. Engineers, chemists and mechanics are at work seeking to improve still further processes and methods which already represent the utmost in efficiency. Pictured is 1500 sacks of cement intimately mixed and properly placed in an hour's time, all in the day's work for a Halliburton crew. Art work by Benton. Unique 1930 old oilfield petroleum industry equipment magazine advertisement. Nice graphics.