The Trials of Lirjlrf Portable Motors at Plymouth. 583 
tubes. The boiler bad a direct spring loaded safety valve. The 
boiler is ordinarily fed- by an injector, but as this was arranged 
in connection with a tank so that measurement of the feed was 
impossible, it was fed during the trial by a hand pump with 
which it was provided. To work this hand-pump during the 
trial, an extra attendant who did nothing else was permitted. 
Fig. 1. — Trick Valve. Jfessrs. E. E. & F. Turner's Engine. 
I 
Section of Slide Valve and Povt Face. Full Size. Maximum StroJce of 
Eccentvic Centre B inch. 
4 
The mounting of the engine as a portable engine was of a rather 
rough and ready description, but here again the defects were of 
a kind easily remediable. 
Messrs. E. R. & F. Turner's engine (Second Prize, 20Z.) was 
a small inverted single cylinder engine, with a Y-shaped frame 
carrying the crank shaft below, the framing being attached to the 
boiler by a wrought iron elastic plate. The engine is known as 
