In my judgment, if we had pursued this course, the zones would have been of short duration. England would have been compelled to take her mines out of the North Sea in order to get any supplies from our country.
Diseases of the Chest and the Principles of Physical Diagnosis, by George William Norris ... and Henry R. M. Landis ... with a Chapter on the Transmission of Sounds through the Chest, by Charles M. Montgomery...