There are on the earth about one billion of inhabitants.
They speak four thousand and sixty-four languages.
Only one person in a thousand reaches his allotted years,--threescore and
ten.
Between the ages of sixteen and forty-five, there are more females than
males.
Lawyers live the longest, doctors next, ministers least of the three
professions.
There are more insane among farmers than of any other laborers.
Caucasians live longer than Malays, Hindoos, Chinese, or Negroes.
Light-skinned, dark-haired persons with dark or blue eyes live the
longest.
Red or florid complexioned, gray or hazel eyes, shortest.
One half of the people die before the age of seventeen; one fourth before
seven.
About 91,824 die each day; one every second.
The married live longer than the single.