LONDON ENTRANCfi TO XilE LONDON AND NOliTii- WESTERN RAILUOAD. 



THE LOCOMOTIVE. 



CHAPTEE I. 



1. Familiar to every eye. 2. Its mechanism not generally understood. 

 3. Object of this Treatise. 4. Two modes of propelling wheel car- 

 riages. 5. How locomotive is propelled. 6. Action of piston-rod 

 on wheels. 7. Dead points. 8. Unequal action. 9. How remedied. 

 10. Connection of piston-rods with wheels. 11. Wheels fixed on 

 their axles. 12. Form of locomotive. 13. Driving-wheels. 14. 

 Coupled wheels. 15. Consumption of steam. 16. Evaporating 

 power of boiler determines efficacy of engine. 17. Fire-box. 18. 

 Tubes through boiler. 19. Fuel. 20. Blast-pipe. 21. Tender. 

 22. Plans and sections, with their description. 



1. ALTHOUGH it be the variety of the steam-engine, whose in- 

 vention is the most recent in date, the locomotive is the form of 

 the machine which is most familiar to the public in every country. 

 To behold the vast engines used for drainage, mining countries 



LARDNER'S MUSEUM OF SCIENCE. i 113 



No. 68. 



