454 



of an acre, and which has frontages to Ricketty and to John 

 Streets, in the newly erected municipality of North Botany. The 

 machinery is contained in a substantial brick building which is so 

 arranged that the crude material is received at a high point whence 

 it gravitates, to the retorts placed below. It is approached from 

 the front by an inclined road which terminates in a platform 22 



At this point is a brick hoi.d ot- rhumbiT, wliicli may be called 



it is closed in front by slidiiig-doors (Fig. 1a): and it is furnished 

 near the wall-plate with a 12-inch tiue through which the air is 

 drawn off by a fan and propelled to the boiler-fires. In place of 

 floor this chamber has a grating made of wrought-iron bars which 

 measure three inches by three-fourths of an inch, which are set on 

 edge three inches apart from centre to centre (Fig. 1b). Beneath 

 the receiving-chamber is the distributing-tank. This is 20 feet 

 deep ■ in shape it is rectangular, and for the first ^ 4 feet f'-o"' ^-^c- 

 top its sides ire peipendicuUr , thereafter the foremost side tiends 

 bickw ud to meet the ifter side which continues perpendicuhr to 

 the bottom Ithxs ipeifoiated ii<m pi ite (Fi- \ c) ^Mthln it 



b\ If vers accessible from above tlie 

 be fed and it the bottom of the : 

 vshich the fluid strained l)v tl,. i 

 solid paits IS xdmitted to th( iiniiu 

 The use of this general m iii_. 



. sill of the 



the retorts (Fig la) are sunt I, 

 thej stmd lbouth^efeftb,lM^ t)„ 

 distributing t ink, the^ lu M,mn , 

 inch pips, (Fig lF)eichotvvhuh 

 ^ ihe iccessible at this level Thfi 

 of i.ths steel l)oilerpUte 24 feet 



