THE STEAM-ENGINE. 



(FIFTH LECTURE.) 



Railways. Effects of Railway Transport. History of the Locomotive Engine. Construction of 

 Locomotive Engine by Blinkinsop. Messrs. Chapman's Contrivance. Walking Engine. Mr. 

 Stephenson's Engines at Killingworth. Liverpool and Manchester Railway. Experimental 

 Trial of the " Rocket," " Sanspareil," and " Novelty." Method of Subdividing the Flue into 

 Tubes. Progressive Improvement of Locomotive Engines. Adoption of Brass Tubes. De- 

 tailed Description of the most Improved Locomotive Engines. Power of Locomotive Engines, 

 Position of the Eccentrics. Pressure of Steam in the Boiler. Dr. Lardner's Experiments in 

 1838. Resistance to Railway Trains. Dr. Lardner's Experiments on the Great Western Rail- 

 way. Experiments on Resistance. Restrictions on Gradients. Compensating Effect of Gradi- 

 ents. Experiment with the " Hecla." Disposition of Gradients should be Uniform. Methods of 

 surmounting Steep Inclinations. 



