We have looked at a few of the phases of human existence; what shall be said of the value of life? Modern science has forever taken from us the comforting delusions of a personal Deity, an immortality for the soul in a personal sense, and the idea of our possessing a will, free to force our direction whithersoever we elect. It has left, in place of these, the idea of duty--individual and personal responsibility--which cannot be shirked. George Eliot, in the epilogue of Romola, preaches as strong a sermon as she ever could to Mr. Meyers, when she talked to him upon that now famous evening in May at Cambridge. Carlyle, no less than his countrywoman, realized, not only the importance of living up to individual responsibility, but also understood how hard it often was to know just what should be done. His rule, which is most worthy of emulation, was: "Do the nearest duty that lies to your hand, and already the next duty will have become plainer." In order that we may be the better prepared to fulfill our responsibilities, we should obtain all the knowledge possible, even although it may cause us lack of insight temporarily, and much mental agony. Faith is not comparable to knowledge, any more than wishing is equal to the obtaining of results. We should therefore be aggressive in the discharge of our duty--liberal and tolerant, pure and upright, loving and unselfish, virtuous and truly religious, so that it may be said of us, when we have finished, that the world is a little better, and life has been, for as many as possible, a little happier for our having lived. THE END THE ~"HOW DOES IT WORK"~ SERIES No. 1. =Electricity.= By THOMAS W. CORBIN. With many Illustrations. Price, 75 Cents, Cloth. Explains in simple language the working of Dynamos, Motors, Heating and Lighting Apparatus, Trainways, Railways, &c. "The information given is clear and easily understood, and many excellent halftones and line drawings are given. It is an A1 book for any boy or man with a leaning towards things electric."--_Publishers' Circular._ "The descriptions are given in very plain language and there are excellent illustrations." No. 2. =Model Making.= By CYRIL HALL. Cloth. With many Diagrams. Price, 75 Cents. Contains instructions for making a Steam Locomotive--Turbine--Steam Boat--Electric Engines--Motors--Yacht--Printing Press--Steam Crane--Telephone--Electric Bells--Telegraph, &c. No. 3. =Modern Engines.= By THOMAS W. CORBIN. With many illustrations. Price, Cloth, 75 Cents. Steam Engines, Gas Engines, Petrol Engines, Marine Engines, Steam Pumps, Steam Boilers, &c., &c. At all Booksellers or postpaid by R. F. Fenno & Company Transcriber's note Text in italics has been surrounded with _underscores_, underlined words with ~signs~, bold with =signs= and small capitals changed to all capitals. The first two columns of the Geological Table at the end of Chapter II have been combined to keep the width within limits.