Journal Royal Society of N.S.W., Vol. XX XVII, 1903. Plate VII. 
ECONOMIC EFFECT OF SANITARY WORKS 
POPULATION.DEATH RATE & EXPENDITURE ON WATER & SEWERAGE WORKS 
w 
o 
i i 5 i 
5s eel: © los Ce « 
Soges| MELBOURNE Ea Ibe 
529|52 i my = 
ge7)S2|¢ FIC.4 BPS eee 
oS | = = wy = 
8 [500 © (500. 8 
al 
q | IV | i 
LS ae 
| | a : i Za | 
z eae 
6 400 | a Ao 19% | | | oo. 6 
|eeNi anel|| 
ok | IL 7A 
g ey 
5 he T all ae jg a 1T 1 5 
| ea 
—— a ee 
4 300/23 |. IL A <li | et =e 23 |300 4 
U 
22/7 : fA | “emPENDITURE [-[-1., 
a eA r— 
3 21 | =a t cy, al Pea OE |, WS ie BT (sd VE 3 
20 EL NAMERASESN TSS ~ eran + PERIOD OF|SEWERACE ——_— | 499 
) ervey Thee —|—CONSTUCTION 
2 20019 ZAC _ oN he My, g |_| 119/200 2 
WATER 17 4 \\%,| ; 
15) | | eee NL | 18 
1 17 lise? 47 /\ | 17 1 
16;— }- +-PERIOD| OF WATER SUPPLY; — | NAL 16 
coneganenye | <P rh ie ace 
Oe ee ertaa® 3 1 2 3 4 a a a) 1 2 3 4 5 6 6 KY Z 
