e. How the sewage is disposed of.
f. What is done in other cities and what should be done here?
g. The importance of a good sewer system to the health of the community.
7. The water supply.
a. Why the city and not the individual furnishes the supply of water in a great city.
b. Why the water supply conditions the growth of the city.
c. Where we obtain our present water supply and how it reaches us.
d. Who has charge of the water supply.
e. The total and per capita supply of water in the city.
f. How water is paid for.