LIST OF PLATES. 



PLATE EXPLANATION. 



PAGE 



i. Isometrical projection of a rectangular steam boiler .... 328 



ii. Two sections of a cylindrical steam boiler ..... 329 



in. Brunton's apparatus for feeding furnaces by machinery . . . 330 



iv. High pressure engine with four-passaged cock ..... 331 



v. Section of a double acting condensing engine for working expansively . . 332 



vi. Section of a common atmospheric engine ..... 333 



vn. Represents the construction of pistons ..... 334 



viii. Parts of Fenton and Murray's double engine ..... 335 



ix. Apparatus for opening and closing steam passages .... 337 

 x. (A), x. (B). Parallel motions or combinations used to produce rectilinear motion 



from motion in a circular arc ....... 338 



xi. Plan and elevation of an atmospheric pumping engine for raising water from a 



mine .......... 339 



xn. Boulton and Watt's single acting engine ..... 340 



xin. Double acting engine for raising water ..... 341 



xiv. for impelling machinery, by Fenton, Murray & Co. . 342 



xv. Maudslay's portable engine ....... 343 



xvi. Indicator for measuring the force of steam in the cylinder . . . 345 



Diagrams to illustrate the comparative stability of opposite classes of vessels ibid 



xvn. Section of a steam vessel with its boiler in two parts . . . 346 



