PREFACE TO SECOND EDITION.
The printing of the present edition from entirely new plates has enabled us to correct a few typographical errors found in the first edition, and give, at the suggestion of friends, a somewhat fuller explanation of the more difficult parts of the subject. We hope that the addition of new material to Chapters iii., iv., v., x., xx., xxi., xlii., xlviii., and of several sets of Miscellaneous Examples, will render the book still more acceptable to those whose commendation of the former edition has given us much pleasure.
June, 1896.
