INDEX. 



243 



Pistons, hemp packed 



friction of . 



Piston rod 



PAGE 

 216 

 221 

 214 



collars . . .222 



guides . . .227 



-strength of . 241, App. 212 



diameters of, for locomotive en- 

 gines, as used by Messrs. Stephenson 

 and Co. . . . 399 



Plates, explanation of > . 327 



Plate 1. Isometrical projection of a rectan- 

 gular steam boiler . . 328 



Plate 2. Two sections of a cylindrical steam 



boiler . . .329 



Plate 3. Brunton's apparatus for feeding 



furnaces by machinery . . 330 



Plate 4. High pressure engine with four- 

 passaged cock . . 331 



Plate 5. Section of a double acting conden- 

 sing engine for working expansively 332 



Plate 6. Section of an atmospheric engine 333 



Plate 7. Represents the construction of 



pistons . . . 334 



Plate 8. Fenton and Murray's double engine 335 



Plate 9. Apparatus for opening and closing 



steam passages . . 337 



Plate 10. (A and B) Combinations used to 

 produce rectilinear motion from motion 

 in a circular arc . . 338 



Plate 1 1 . Plan and elevation of an atmos- 

 pheric pumping engine for raising water 

 from a mine . . . 339 



Plate 12. Boulton and Watt's single acting 



engine . . . 340 



Plate 13. Double acting engine for raising 



water . . .341 



Plate 14. for impelling 



machinery . . . 342 



Plate 15. Maudslay's portable engine . 343 



Plate 16. Indicator for measuring the force 



of steam in the cylinder . . 345 



Diagrams to illustrate the com- 

 parative stability of opposite classes of 

 vessels . . . 345 



Plate 17. Section of a steam vessel with its 



boiler in two parts . .346 



Plate 18. Isometrical projection of a steam 

 boat engine as first arranged by Boul- 

 ton and Watt . . . 347 



Plate 19. Steam boat engine . . 349 



Plate 20. Side elevation and cross section 



of a steam carriage . . 350 



Plate 21. Kingston's valves . . 353 



blow off valves . . ibid 



hand pump valves . . 354 



injection valves . . 353 



manner of fixing the valves . 354 



Plate 22. Boiler of H. M. steam vessel 



African . . . 355 



Plate 23. Boilers of H. M. steam frigate 



Medea . . . ibid 



Plate 24. Paddle wheels of Morgan and 



Seaward . . .357 



Plate 25. Positions of a float of a radiating 

 wheel, and also of a vertical acting 

 wheel, in a vessel in motion . ibid 



Plate 26. Cycloidal paddle wheel fitted to 



the Great Western " . . ibid 



Plates 27, 28. To illustrate Capt. Oliver's 



paper . . . 358 



Plate 29. Exhibits the various situations of 

 a trial at sailing of the Medea, with the 

 Caledonia, Vanguard, and Asia . ibid 



Plate 30. Side view of the engines of the 

 Red Rover, and City of Canterbury, 

 steam vessels . . . ibid 



Plate 31. Longitudinal section of the Red 



Rover's engine . . 359 



Plate 32. Cross section of engines of the 



Red Rover . . . 360 



Plate 33. Side elevation of the engine of the 



Nile steam ship . . 361 



Plate 34. Plan of the engine of the Nile ibid 



Plate 35, 36. Cross sections of engines of 



the Nile . . . 362 



Plates 37, 38, 39. Engines of H. M. steam 



frigate Phoenix . . 363 



Plate 40. Engines of the Ruby Gravesend 



packet . . . 364 



Dimensions and speed of . 367 



Plate 41. Section of one of the engines of 



the Don Juan 368 



