51.B. Sixth Edition, 1897. H. K. Lewis : London, pp. 608, large post 8vo. 10s. 6tf. This well known text-book lias achieved such a secure position that little criticism is necessary in noting its sixth edition. It is now printed on thinner paper than formerly with the result that the matter in it has increased, while the bulk has not. A. few of the illustrations have also been omitted, and the ...