the life of the whole city becomes concentrated at the gates; everything that goes out of or in to it must pass these narrow openings. it involved the infection of more than 120,000 computers and generated, on average, 6 million us dollars per month from advertising traffic. gas volume does not take into account the quality of the gas or the amount of heat available when burned. sometimes a pulley is used to provide mechanical advantage. however, that was not followed through. such a federal system will bring the government as a whole closer to the people than a purely national form of government would. 