Journal Royal Society of N.S.W., Vol. XX XVII, 1903. Plate VI. 
ECONOMIC EFFECT OF SANITARY WORKS 
POPULATION DEATH RATE & EXPENDITURE ON WATER & SEWERAGE WORKS 
SYDNEY 
LY & SEWERAGE 
DEATH RATE PER 1000 
DEATH RATE PER 1000 
WATER SUPPLY & SEWERAGI 
EXPENDITURE MILLIONS. 
© POPULATION THOUSANDS 
FIC.3 
oa 
| | 
| 
450) 450 
| | 
8 400 hog 8 
| 9 
7-360 = 350.7 
ie | Ny 
oo 
6 300 bi 300. 6 
| 
5 250 250. 5 
ys 
26 i Sy -|26 \g00 4 
4 200 : ie 
ze ae ante \25 
24 % | 4 ee ENO 24 
| 23) Ane E NBs ae Li 
| 8 150 22 N/ i our? 22 liso 3 
21 P7AIDS ae TERS = |21 
pee ee ee <= = at a 
9, aT ~ ofA bt.) 
2-100, 18 ge a SA aialines i 
13 wee | “DR pag 
is ZA Bey V SAT, 15 
14 soa} ft | So~ PATE | 14) so.1 
| L ma | 
11F--PERIOD OF WATE SUPPLY “PERIOD OF SEWERACE CONSTRUCTION 711 
0) 0/10 CONSTRUGTI 101010 
67 8 9 1 2 A 4 5 67 6 9 123 45 67 6 98 
1875 1880 1890 1900 
