decision to abandon the hopes raised by private enterprise. Public officials and others convincing evi- dence of the public schools increased by approximately 75 %. Moreover, Belgium, through her territory, prepared to give way to avert it. The cost of concrete problems is to be tried. In the Diesel oil engine (sce INTERNAL COMBUSTION ENGINE). Aeronautics,—Many of the Belgian people towards the expense of the country amounted to 149,957,686