392 EXPLANATION OF THE PLATES. 



PLATE LVI. B. 



This plate shews a plan of the engines of the Dartford. 



E E, The cylinder lids or covers. 



C C, The cranks. 



D D, The steam-tight casings or trunks. 



G G, The stuffing boxes. 



H H, The connecting rods. 



a a, Slide valve boxes. 



c c, Starting handles. 



c, Hot well. 



ff, Discharge pipes. 



hh, Eccentric rods. 



s, Air pump. 



k. Hand pump. 



mi, Bilge pumps. 



v v, Feed pumps worked by levers connected with the cross head of the air-pump rod. 



w, Platform on which the engineer stands to start the engines. 



.? x x x, Foundation plate, cast in one piece and firmly secured to the four sleepers. 



yyyy, This plate measures 13 feet 8 inches athwartships, and 8 feet 6 inches fore 

 and aft, which is the space occupied by the two engines. The cylinders are 

 each 42 inches diameter, and the pistons have a stroke of 3 feet 8 inches ; the 

 paddle wheels are 18 feet diameter, and 7 feet wide ; the load water draught 

 of the vessel is 8 feet 9 inches ; the mean revolutions of the engines 26. 



PLATES LVIL, LVIIL, AND LIX. 



FORTY-FIVE HORSE POWER ENGINE CONSTRUCTED BY W. FAIRBAIRN AND CO. 



Plate LVIL J* 1 * ^ Elevation of engine. 

 1 2. Plan of ditto. 



LVIIL 



3. Front elevation. 



4. Back ditto. 

 LIX. 5. Cross section. 



The letters refer to the same parts in all 



the views. 



