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Published online by Cambridge University Press: 18 August 2016
The subject dealt with in this paper has already been introduced by a letter to the Insurance Record, of 24 February 1905, but I am now able to put forward certain further developments of the theory and method there set out.
page 15 note * The symbol σ[x]+1 originally used has been altered since this paper was read, in order to bring the notation into conformity with Mr. Ackland's.
page 18 note * As Mr. Lidstone points out, when the second equation is used in combination with the first, this statement is not true. In the following, the word “weight” must be understood to refer to the coefficients of ф[x]+t and Xtф[x]+1 in the second equation only, taken by itself.