The electromagnetic fields from oscillating horizontal and vertical magnetic dipoles are calculated for loops placed above an n-layer earth. The formal solutions for the magnetic fields in air are presented in terms of three infinite integrals which may be evaluated numerically on a digital computer. A completely generalized computer program for that purpose has been included in this paper. The program has been used to make a detailed analysis of the polarization characteristics of the fields from airborne vertical and horizontal magnetic dipoles above a multi-layer earth.

As a slag heap, the result of strip mining, creeps closer to his house in the Ohio hills, fifteen-year-old M. C. is torn between trying to get his family away and fighting for the home they love.