By Robert Scott Burn . With 300 Engravings. Demy 8vo, cloth, 2s. “This Book should be given to every youth, for amusement as well as for instruction.”— Taunton Journal. Third and Revised Edition. MECHANICS AND MECHANISM. By Robert Scott Burn . With about 250 Illustrations. Demy 8vo, cloth, 2s. “One of the best-considered and most judiciously-illustrated elementary treatises on Mechanics and Mechanism which we have met with. The illustrations, diagrams, and explanations are skilfully introduced, and happily apposite—numerous and beautifully executed. As a handbook for the instruction of youth, it would be difficult to surpass it.”— Derby Mercury. Second Edition, Revised by the Author. THE STEAM ENGINE: ITS HISTORY AND MECHANISM. Being Descriptions and Illustrations of the Stationary, Locomotive, and Marine Engine. By