Geomagnetic fluctuations, recorded simultaneously at several sites located in the Adirondack region of northern New York State, have been analyzed using the gradient method of Kuckes and Schmucker. Four three-axis flux gate magnetometers were deployed across the Adirondack Dome in a square array, separated by approximately 60 km. The complex inductive scale length, defined as the ratio of the vertical magnetic field and the horizontal gradient, has been estimated for fluctuations in the period range 10 to 200 s. These data indicate that the Adirondack Dome is laterally uniform and characterized by a conducting layer in the lower crust. The conductance of this layer is approximately 400 mhos.