14 SCIENCE OF SUCCESSFUL THRESHING. 



important to see that the Suction hose and connections are 

 free from leaks. The pipe nipples, which screw into the 

 boiler at the point at which the feed water enters, should be 

 examined occasionally, for with some waters they "lime-up" 

 in a remarkably short time. When necessary to shut down 

 from lack of water, it should be done while the glass shows 

 at least half an inch, as the water-level will fall that much 

 when the engine is stopped, and the water in the boiler al- 

 lowed to settle. 



What to do when water does not show in glass. If you 

 find that the water has been allowed to get below the glass 

 gage and lower gage cock, leaving the crown-sheet bare, 

 when the engine has been standing still for a time, bank the 

 fire and leave the engine alone until it cools. If it be 

 working when you discover the water is out of the glass, 

 the thing to do, is get the front end of the engine up at once. 

 Back the traction wheels into ditch or furrow, run the front 

 wheels up hill or onto a wood or coal pile, or use any means 

 to get the front of the boiler high. If in soft ground there 

 may be time to dig holes for the traction wheels, but be 

 quick about it. In the meantime keep the engine moving 

 in order to slosh the water over the crown-sheet. When you 

 have the front end of the engine up, if water shows in the 

 glass, start the injector and let it run until the boiler is filled 

 to its normal level If you are unable to get the engine in 

 such a position that the water shows in the glass, cover the 

 fire with a layer of ashes or earth three or four inches thick. 



