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The Georgia Highway Department has been experimenting with and gaining useful information from the use of an electrical apparatus that measures the resistance of soils to the flow of direct current. This apparatus was built at the Georgia Institute of Technology from drawings designed by the Bureau of Public Roads.
The purpose of this paper is to demonstrate the practical value of this apparatus in making subsurface explorations from a highway builder’s point of view. Ten points of explorations have been selected from areas of widely divergent geological formations. The analogue to each of these points can be found in similar geological formations throughout the state.
The ten points listed below give the following information:
1. Short description of the geological formation.
2. Diagram showing the resistance curves.
3. Description of the soil or rock encountered on actual excavation.
Abercrombie, W. F.
Engineer of Materials and Tests, State Highway Department of Georgia, Atlanta, Ga.