LIST OF PLATES. 
PLATE EXPLANATION. 
PAGE 
i. Isometrical projection of a rectangular steam boiler .... 328 
ii. Two sections of a cylindrical steam boiler . • • • 329 
hi. 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 
vii. 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 
xi. Plan and elevation of an atmospheric pumping engine for raising water from a 
mine 
xii. Boulton and Watt’s single acting engine ..... 
xiii. Double acting engine for raising water ..... 
xiv. for impelling machinery, by Fenton, Murray & Co. 
xv. Maudslay’s portable engine ....... 
xvi. Indicator for measuring the force of steam in the cylinder 
Diagrams to illustrate the comparative stability of opposite classes of vessels 
xvn. Section of a steam vessel with its boiler in two parts 
338 
339 
340 
341 
342 
343 
345 
ibid 
346