Some Engineering Problems of the Panama Canal in Their Relation to Geology. E-book. Formato PDF Donald Francis Macdonald   -  Forgotten Books, 2017  - 

In the preparation of accurate estimates concerning the cost of large excavations information regarding the geologic conditions, as obtained by a study of natural features, is necessary. Drill holes and test pits will furnish supplementary geologic information, but without a gen eral knowledge of the geologic conditions it will not be possible for the constructing engineer to answer such questions as the following.