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Average . Duration of Human Life.. The average length of. life is about twenty eight years. One quarter die pre vious to the age of seven, one half before reaching seventeen. Only one of every 1,000 persons reaches 100 years. Only six of every hundred reach the age of sixty-five, and not more than one in 500 lives to eighty years of age. Of lth whole' population on the globe it is estimated that 50,000 dio every day, about 3.700 every hour, and sixty every minute, or one every second. These losses are more than counter-balanced by the number of births; The married are longer lived than the single. The average duration of life in all cihilised countries is greater now tlhan in any anterior period. Macauloy, the distinguished historian, statoesthat in the year 1685, not an uhnealthy year,, the deaths in England were as 'on to'ten ; but in 1830, one to forty. Dupin,'a well Inown French writer, states .that the average duration of life in France, fr.om. 1776 to 184.', increased fifty-two. days annually. Thd rate of mortality in 1781 was one in twenty'two. but in 1820, one in forty. The rich men live on.an. aver age forty.two years, but the poor only thirty-years.-The Fireside.