In the year 1716, Abraham de Moivre published his ""Doctrine of Chances"", in which the subject of Mathematical Probability took several long strides forward. A few years later came his ""Treatise of Annuities"". When the third (and final) edition of the Doctrine was published in 1756, it appeared in one volume together with a revised edition of the work on Annuities. It is this latter two-volumes-in-one that is presented here in an exact photographic reprint, with a series of problems of progressive interest, followed by full solutions and an afterword by H.M. Walker.