94 Book of Engineering 



was the only engine of those entered to 

 fulfil the conditions, passing the ten-mile 

 test and actually averaging something like 

 15 miles an hour for the whole of her 

 trips, whilst at a special trial she reached 

 35 miles an hour. The triumph of speed 

 indeed ! 



Now there are two kinds of speed the 

 spectacular and the useful, and in the in- 

 stances we are to consider let us keep those 

 two kinds always in mind. Some prefer 

 spectacular most young folk do others 

 will prefer the useful a speed which may 

 serve every day and without any special 

 preparation. Thus, talking still of the iron 

 road, let us see the two kinds of speed 

 upon it, tracing very briefly the upward 

 tendency upon the railway. 



Speeds rose rapidly as soon as the rail- 

 ways settled down to work; very soon the 

 average rate of travel of the express train 

 had reached 30 miles an hour. This appears 

 slow to us, but one must consider it as 

 relative to the best on the road and here 

 then we have a 300 per cent increase in, 



