Developing Stationary Engine 161 



ing of the operation of a ship's auxiliary, 

 and one was immediately constructed on 

 these lines, and run at a considerable higher 

 speed than had hitherto been possible. It 

 became apparent at once that another 

 means, other than by splash, must be 

 employed to convey oil to the working 

 parts, and in 1890 the introduction of the 

 totally enclosed engine using forced lubri- 

 cation revolutionised engine practice. 



Since this first engine, one British firm 

 alone has constructed upwards of 8400 on 

 the same principle, of horse-power varying 

 from 10 to 2,500, and speeds varying from 

 1,500 to 200 revolutions. These engines 

 operate with the minimum of vibration and 

 noise under all conditions, and are equally 

 suitable for use as back-pressure or pass- 

 out as they are for condensing conditions. 



Pass-out Turbines 



Then there is the constant improvement 

 in the non-reciprocating engine of which 



