DOUBLE ACTING ENGINE, ZINC WOKKS, CITY ROAD, LONDON. 



THE STEAM ENGINE. 



CHAPTER I. 



1. The steam engine. 2. Consists of two essential parts. 3. The boiler. 

 4. Material employed in its formation. 5. Feeding apparatus. 



6. Importance of keeping the water in the boiler at a proper level. 



7. Wet and dry steam. 8. Priming. 9. Meansof ascertaining the level 

 of the water in the boiler. 10. Self-acting feeders. 11. Safety valve. 

 12. Steam gauge. 13. The furnace. 14. Proper mode of feeding 

 the furnace. 15 . Rarely'observed. 16. Contrivance for supplying fuel. 



LARLNER'S MUSEUM OP SCIENCE. B 1 



No. 53. 



