PUMPING MACHINERY OF THE WATER AND SEWERAGE BOARD. XXVII. 



Ill this State there have been a fair number of installations 

 during the past thirty years to guide us in the selection of 

 the fittest, and to provide a study of the various good 

 qualities which might be availed of in the adoption of the 

 best of these. 



There was the old Botany plant which served this city 

 many years ago. This is an example of the old beam type 

 of pumping engine, now practically gone out of use. Crown 

 Street Pumping Station has passed along the various stages 

 from horizontal direct acting rotative engines, supple- 

 mented by Blake's pumps, to the most remarkable engine 

 at the date of installation ever introduced into the colonies, 

 viz., the direct acting non-rotative Worthington engine, 

 connected up to Babcock and Wilcox boilers, also the first 

 of their kind in this State. Supplementing these is now 

 the high duty centrifugal connected to an electric motor of 

 700 H.P. Another station, Ryde, has a good type of old 

 style pumping engine lately supplemented by turbo pumps 

 connected to the latest type Stirling boilers. 



Marrickville Sewerage and Stormwater Station has two 

 pairs of differential direct acting compound pumping engines 

 of the Hathorn-Davey type, whose peculiar feature is 

 somewhat allied to the Worthington, in so far as provision 

 is made to store energy at the beginning of the stroke. 

 While on the question of economy, it must be remembered 

 that an economical plant includes the whole of the stages, 

 from the handling of coal at the point of supply to the 

 station, right through the final one of the disposal of the 

 ashes and waste in other directions, after the whole of the 

 available temperature has been economically utilized, not 

 forgetting that much waste is caused by the want of 

 appliances essential to this end, and, in many cases, by the 

 want of vigilance or the necessary interest in these matters 

 to guard against losses in this particular. Hence the 



