LIST OF PLATES. xvii 



PLATE EXPLANATION. 



PAGE 



xvni. Isometrical projection of a steam boat engine as first arranged by Boulton 



and Watt ......... 347 



xix. Section and plan of steam boat engine ..... 349 



xx. Side elevation and cross section of a steam carriage .... 350 



xxi. Kingston's valves ........ 353 



blow off valves ........ ibid 



injection valves ........ ibid 



hand pump valves ........ 354 



xxn. Boilers of H. M. steam vessel African ..... 355 



xxin. Boilers of H. M. steam frigate Medea ..... ibid 



xxiv. Paddle wheels of Morgan and Seaward . . . . .357 



xxv. Positions of a float of a radiating wheel, and also of a vertical acting wheel, in 



a vessel in motion ........ ibid 



xxvi. Cycloidal paddle wheel fitted to the Great Western . . . ibid 



xxvu., xxvin. Illustrate Capt. Oliver's paper ..... 358 



xxix. Exhibits the various situations of a trial at sailing of the Medea, with the 



Caledonia, Vanguard, and Asia ..... Appendix 100 



xxx. Side view of the engines of the Red Rover, and City of Canterbury, steam 



vessels ......... 358 



xxxi. Longitudinal section of ditto ...... 359 



xxxii. Cross section of engines of ditto . . . . . . 360 



xxxin. Side elevation of the engine of the Nile steam ship . . . 361 



xxxiv. Plan of the engine of the Nile ...... ibid 



xxxv., xxxvi. Cross sections of engines of the Nile .... 362 



xxxvii., xxxvin., xxxix. Engines of H. M. steam frigate Phoenix . . 363 



XL. Engines of the Ruby Gravesend packet ..... 364 



XLI. Section of one of the engines of the Don Juan Peninsula Company's packet . 368 



XLII. Boilers of H. M. ships Hermes, Spitfire, and Firefly . . . ibid 



