298 



J^Togg's Patent com col Boihr, 



cast in one piece, to which the outsitle boiler, made of wooden 

 staves, is fitted, and well bound with iron hoops. The whole stands 

 on a square iron plate {c e), supported by the brickwork of the 

 ashpit (J); and, from the top of this plate, the ring g g rises and 

 fits into a bead on the bottom of the furnace. In this ring there 

 are two pins; the one is shown at // on which the grate turns, 

 and at J there is a hole through which the other pin (/.) passes, 

 and sujiports the grate. 



The fuel is put in at the toj) of the pipe c, and receives air 

 from the front of the ashpit, which has a register door, as shown 

 by the elevation (Jig- 105.); the draught passing up the pipe I) 

 {^fig. lO*.), in which there is a danijier (/). The two water-pipes 

 [m m) are fastened on either by bolts or screws, and they can be 

 made to lead from the boiler either horizontally, or perpendicu- 

 larly ; as shown by the elevation /^'. 105. 7i is an expansion 



