I2O Book of Locomotives 



our engineer puts down in writing some of 

 the things which matter for his new 

 machine. Then, having sketched out his 

 ideas, the papers go to the drawing office, 

 where first drawings are made. These are 

 looked at carefully and any errors or ad- 

 ditions dealt with. Then the blue prints 

 are made from the drawings, usually these 

 are made on a very large scale, often to 

 actual scale. 



Then the material required, say, for a 

 batch of ten engines, is ordered. In the 

 smaller works much of the locomotive will 

 come already made, in sections ; in the large 

 ones, like Crewe or Swindon, practically 

 everything is made from raw material. 



Now we must visit the various " shops ' 

 where the different sections of locomotive 

 building are under weigh. Suppose we 

 start with the boiler shop? Here there are 

 big sheets of steel being passed to and fro 

 through rollers. We watch this with in- 

 terest, wondering why so much trouble is 

 taken. At last a plate is ready and we see 

 that the rolling has brought it almost to 



