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A geophysical survey was conducted in Franklin County, Ohio of the earth's total magnetic field. The instrument used in the field work was a proton precession magnetometer. Buried ferromagnetic cylindrical pipes are located at the two areas at which the magnetic survey was conducted. The magnetic anomalies caused by cylindrical pipes frequently serve as models for more complex perturbations of the earth's magnetic field. This would include geological structures such as anticlines and dikes. My survey is concerned with the spatial variations in the earth's magnetic field caused by ferromagnetic pipes. Therefore, the observed field data was reduced to compensate for diurnal variation. The reduction was completed prior to constructing the magnetic profiles and the total magnetic field contour maps.