SYDNEY WATEE SUPPLY BY GElVITATIOlsr. 53 



this now bighly prized manure, at tlie same time that it keeps the 

 towns which, are treated by Liernur's process in a perfect state 

 of purity and salubrity. 



Eitter, on the other hand, produces the same results in a far 

 superior way, by collecting the sewage and the waste waters as 

 they come away from tbe houses ; they are brought to two 

 centres in the town, wherefrom and by a valuable application of 

 a part of th.e great hydraulic power which he has at his command 

 he rids the city of everything both liqu.id and solid from the 

 sewers, and sends it all to a great distance outside the city and 

 high up on to lands in two different directions, where systematic 

 irrigation is constantly maintained and with important results. 

 This enterprise is found to pay those interested there in E-itter's 

 grand application of the compression of air through hydraulic 

 force. 



Practically we might compare the two systems to the principle 

 of the syringe. Liernur's system clraios the sewage into the 

 partial vacuum, whilst Ritter's is the counterpart of the action 

 of the same syringe, and drives all before it by the action of the 

 piston compressing the air. 



I should apologize for the above digression from the direct 

 subject under consideration, did I not conceive that my proposed 

 high pressure delivery of the waters, and which would constitute 

 a large portion of my proposed supplies, has a most significant 

 bearing on the value of my scheme for giving such valuable 

 motory power without any necessary waste of the waters used to 

 create such action ; whilst, at the same time, the high pressure 

 would give such quick delivery of pure water into the city that 

 pipes of less than half the size and weight would deliver as much 

 water from my proposed in-take elevation of 1,050 feet at the 

 mains as could be delivered hj the low-level operation from the 

 large and heavy main out of the Port Hacking E,iver from an 

 elevation there of only 170 feet over the sea, or (say) 34 feet 

 above the level of the Crown-street Reservoir, from whence I 

 propose to take in those lower waters. 



In connection with such proposed available water-power, as 

 well as for the diffusion of useful and interesting knowledge, I 

 have the pleasure of laying on the table of this Society my recent 

 translation from the German of Mr. Engineer Delabar's most 

 interesting paper on Eitter's Waterworks at Freiburg ; it is taken 

 from Dingier' s Poly technical Journal, a work of celebrity in 

 Germany. I would propose that this translation be attached to 

 this water supply paper as an appendix to the same, and taken as 

 read ; because I consider that whatever thought I have given to 

 the development of my water scheme I owe much of its origina- 

 tion to my having been favoured with the possession and reading 

 of such a valuable paper — a paper which gives evidence through- 



