UOL TUMBLE E: 43 



must be some fire." Well, that is true, but a good 

 in don't make much smoke. We are speaking of 

 -al, now. If 1 can sec the smoke ten miles 

 engine, I can tell what kind of a fireman 

 imng the engine and if there is a continuous cloud 

 of black smoke being thrown out of the smokestack, 1 

 up my mm.l that the engineer is having all he can 

 keq> the steam up, and also conclude that there will 

 >o much coal left by the time he gets through with 

 the job; while on the other hand, should I see at regu- 

 lar intervals a cloud of smoke going up, and lasting for 

 and for the next few moments sec noth- 

 ing, then I conclude that the engineer of that engine 

 s business, and that he is not working hard; he 

 has plenty of steam all the time, and has coal left when 

 he is through. So let us go and sec what makes this 

 : ence anil learn a valuable lesson. We will first go 

 to the engine that is making such a smoke, and we 



that the engineer has a big coal shovel just small 

 enough to allow it to enter the fire door. Yon will see 

 :ieer throw in about two, or perhaps three shov- 

 elfuls of coal, and as a matter of course, we will sec a 

 volume of black smoke issuing from the stack. The en- 

 gineer stands leaning on his shovel watching the steam 

 gauge, and he finds that the steam doesn't nm up very 

 About the time the coal gets hot enough to con- 



