Taking twenty-one as the time of maturity in man, the natural term of human life would be one hundred and five.

Sir Richard Owen fixes it at one hundred and three and a few months.
Censuses of Centenarians .-- Dr.Farr, the celebrated English Registrar-General, is credited with saying that out of every 1,000,000 people in England only 223 live to be one hundred years old, making an average of one to 4484.

French says that during a period of ten years, from 1881 to 1890, in Massachusetts, there were 203 deaths of persons past the age of one hundred, making an average, with a population of 394,484, of one in 1928.

Of French's centenarians 165 were between one hundred and one hundred and five; 35 were between one hundred and five and one hundred and ten; five were between one hundred and ten and one hundred and fifteen; and one was one hundred and eighteen.

Of the 203, 153 were females and 50 males.