grows buy one population point. This added population is
put to work on the city map.

DISORDER: If the number of unhappy citizens exceeds the
number of happy citizens due to population growth or the
destruction of a city improvement by disaster, your city
goes into civil disorder. You receive a message reporting
this condition. If this is the first turn of disorder, you
jump to the affected city's display so that adjustments
can be made to return the city to order. If the situation
is not corrected, in following turns you are notified that
disorder continues.

MAINTENANCE: Taxes collected from the city are added to
your treasury and then the maintenance costs for
improvements in this city are deducted. If you don't have
sufficient funds in your treasury to pay the maintenance
costs, one improvement in this city, chosen by local
leaders, is sold. Note that while your civilization as a
whole may have a revenue surplus for the turn, you can
still lose and improvement when your treasury is low. High
maintenance costs for the first cities checked may
deplete the treasury and force a sale before later cities
contribute their cash surpluses.

SCIENTIFIC RESEARCH: The research contributed by this
city, measured by the number of light bulbs it produces,
is added to the total so far accumulated by your
civilization. If this total is sufficient to acquire the
technology that you have instructed your scientists to
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