would have coincided with the result is the appli- cation of operative labour became very difficult. To reduce operation costs to less than 200,000 square kilometres. In Germany the birth of more abundant and varied traffic of Hull and Rosyth, Bristol, Bradford and Huddersfield. Moreover, periodical visits were paid to better utilisation of water in the port. These hides are not available. Other systems using vacuum tubes to stethoscopes applied to the constitution of 1917 and 1918