Page:The Steam Turbine.djvu/19

 the steam to issue from a trumpet-shaped jet, so that the energy of expansion might be utilized in giving velocity to the steam. Recent experiments have shown that in such

Fig. 4. Dr de Laval's Turbine.

jets about 80 per cent, of the whole of the available energy in the steam is converted into kinetic energy of velocity in a straight line, the velocity attained into a vacuum