The Life Tables which we have prepared and have now the honour of submitting to the Faculty, are based on the Male and Female Populations of Scotland as ascertained by the Census taken on 2nd April 1911, and on the average of the deaths registered in Scotland during the years 1910, 1911, and 1912.

In having used the censal population for the purpose of this study, and not a middle year estimate of the population, we lay ourselves open to some criticism, as a middle year estimate is more generally approved of for this purpose.