380 LOCOMOTIVE ENGINE. 



detail, reference being had to the drawing annexed, and to the 

 figures and letters marked thereon, that is to say : 



"Description of the Drawing. [Plate XVII.] 



" Figure 1 represents a series of vertical sections through the 

 various essential parts of the boiler, the dry pipes, the steam- 

 pipe, the working cylinder, the propelling cylinder, and the 

 flue, together with sections and views of other minor parts, 

 serving to show the connections of the essential ones. The 

 places at which these sections are taken are shown in Figure 2 

 by the dotted line from A to B, from B to C, from C to D, and 

 from E to F. Figure 2 represents a plan of Figure 1, with the 

 top coverings of the boiler and working cylinder removed. 

 Figure 3 shows the manner of uniting the shorter upright pipes 

 over the fire doorway with one of the adjoining ones, so as to 

 give free circulation of the water in all the pipes. Figure 4 

 represents three pairs of syphons, which in their places stand in 

 a circular form, but in this Figure are shown as spread out into 

 a plane, in order the better to explain their structure and join- 

 ings. Similar small letters and numbers of reference are used to 

 denote similar parts in all the Figures; a, the upright boiler- 

 pipes, the upright and lower ends of which are contracted to 

 leave room for bolt-heads and nuts, without throwing the pipes 

 too far asunder; &, the tubular ring having a flanch projecting 

 inwards and outwards at the upper side, perforated with aper- 

 tures upon which the upright pipes are bolted, and another 

 flanch at the bottom, projecting inwards, to bolt the ring down 

 to the foundation plate; c, the foundation plate; d, the fire- 

 grate ; e, the fire doorway ; f, the upper tubular ring, having a 

 flanch at the bottom projecting inwards and outwards, and 

 perforated with apertures corresponding with the tops of the 

 upright pipes upon which the tubular ring lies, and to all which 

 it is bolted ; g, the level of the water in the boiler-pipes ; h, the 

 dry pipes formed like inverted syphons, so as to require no 

 joining at the lower part near the fire ; one leg of each of the 

 two syphons shown in Figure 1 is in section, and broken near 

 the bottom ; an outside view of the other leg appears partly 

 behind the section ; k, the short bent pipes, each bolted to two 



