INDEX. 
243 
* PAGE 
Pistons, hemp packed . . *216 
friction of . . .221 
Piston rod . . .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 . . 830 
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 11. 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 . 
Plate 19. Steam boat engine . 
Plate 20. Side elevation and cross section 
of a steam carriage 
Plate 21. Kingston’s valves . 
— blow off valves 
hand pump valves . 
— injection valves 
manner of fixing the valves 
Plate 22. Boiler of H. M. steam vessel 
African 
Plate 23. Boilers of H. M. steam frigate 
Medea 
Plate 24. Paddle wheels of Morgan and 
Seaward 
Plate 25. Positions of a float of a radiating 
wheel, and also of a vertical acting 
wheel, in a vessel in motion 
Plate 26. Cycloidal paddle wheel fitted to 
the Great Western 
Plates 27, 28. To illustrate Capt. Oliver’s 
paper 
Plate 29. Exhibits the various situations of 
a trial at sailing of the Medea, with the 
Caledonia, Vanguard, and Asia 
Plate 30. Side view of the engines of the 
Red Rover, and City of Canterbury, 
steam vessels . 
Plate 31. Longitudinal section of the Red 
Rover’s engine 
Plate 32. Cross section of engines of the 
Red Rover 
Plate 33. Side elevation of the engine of the 
Nile steam ship 
Plate 34. Plan of the engine of the Nile 
Plate 35, 36. Cross sections of engines of 
the Nile 
Plates 37, 38, 39. Engines of H. M. steam 
frigate Phoenix 
Plate 40. Engines of the Ruby Gravesend 
packet 
Dimensions and speed of 
Plate 41. Section of one of the engines of 
the Don Juan 
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