Washington D.C. Paper - Topographical and Geological Modelling

In working out the geological structure of a complicated district, where the problems are difficult to solve by the ordinary methods in use, a model, upon which all the geological and topographical data may be put, will be found of great value, bringing, as it does, all the facts in their proper relationship at once under the eye. In the teaching of structural geology, also, a model is of great value, since the student can thus have before him, in miniature, a representation of the rocks, as he would see them in place. Topographical models may often be useful in suits at law for damages in railroad accidents, or for trespass against mining companies, etc., in order