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ONE:"You are pleased to say so," Balmayne said smoothly.In no other branch of machinery has so much research and experiment been made during eighty years past as in steam machinery, and, strange to say, the greater part of this research has been directed to the details of engines; yet there has been no improvement made during the time which has effected any considerable saving of heat or expense. The steam-engines of fifty years ago, considered as steam-using machines, utilised nearly the same proportion of the energy or power developed by the boiler as the most improved engines of modern construction��a fact that in itself indicates that an engine is not the vital part of steam machinery. There is not the least doubt that if the efforts to improve steam-engines had been mainly directed to economising heat and increasing the evaporative power of boilers, much more would have been accomplished with the same amount of research. This remark, however, does not apply to the present day, when the principles of steam-power are so well understood, and when heat is recognised as the proper element to deal with in attempts to diminish the expense of power. There is, of course, various degrees of economy in steam-using as well as in steam-generating machinery; but so long as the best steam machinery does not utilise but one-tenth or one-fifteenth part of the heat represented in the fuel burned, there need be no question as to the point where improvements in such machinery should be mainly directed. TWO:Before the ideas which we have passed in review could go forth on their world-conquering mission, it was necessary, not only that Socrates should die, but that his philosophy should die also, by being absorbed into the more splendid generalisations of Plato��s system. That system has, for some time past, been made an object of close study in our most famous seats of learning, and a certain acquaintance with it has almost become part of a liberal education in England. No170 better source of inspiration, combined with discipline, could be found; but we shall understand and appreciate Plato still better by first extricating the nucleus round which his speculations have gathered in successive deposits, and this we can only do with the help of Xenophon, whose little work also well deserves attention for the sake of its own chaste and candid beauty. The relation in which it stands to the Platonic writings may be symbolised by an example familiar to the experience of every traveller. As sometimes, in visiting a Gothic cathedral, we are led through the wonders of the more modern edifice��under soaring arches, over tesselated pavements, and between long rows of clustered columns, past frescoed walls, storied windows, carven pulpits, and sepulchral monuments, with their endless wealth of mythologic imagery��down into the oldest portion of any, the bare stern crypt, severe with the simplicity of early art, resting on pillars taken from an ancient temple, and enclosing the tomb of some martyred saint, to whose glorified spirit an office of perpetual intercession before the mercy-seat is assigned, and in whose honour all that external magnificence has been piled up; so also we pass through the manifold and marvellous constructions of Plato��s imagination to that austere memorial where Xenophon has enshrined with pious care, under the great primary divisions of old Hellenic virtue, an authentic reliquary of one standing foremost among those who, having worked out their own deliverance from the powers of error and evil, would not be saved alone, but published the secret of redemption though death were the penalty of its disclosure; and who, by their transmitted influence, even more than by their eternal example, are still contributing to the progressive development of all that is most rational, most consistent, most social, and therefore most truly human in ourselves."Come to tell me you have made a discovery, eh?" he asked. "No need to tell me that, I can see it in your face. Sit down man--one o'clock in the morning is comparatively early for a novelist. Go on."

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