Improvement in Blacksmiths Forges 4 Improved Fire Engine 4 A simple Cheese-Press* 4 Cast Iron Roofing 4 The New and Wonderful Pavement 4 To render Shingles Durable 4 Best Plan of a Barn 4 Robert Fulton 4 Introduction to Volume II 5 Advantage of Low Fares 5 Avalon Railroad Iron 5 The Magnetic Telegraph 5 Advertising In London 5 Deerfield Bridge 5 Information Wanted 5 Railroad Intelligence 5 Arrival of the Cambria 5 The Mexican War 5 Trade to Santa Fe 5 THE SCIENTIFIC AMERICAN--subscriptions 5 The Harbor of Havana* 6 A Very Long Nose 6 Sol. Smith 6 A Profitable Hoax 6 Reforming 6 Wrong Side Up* 6 Importance of Humility 6 The Eureka: or Journal of the National Association of Inventors 7 ADVERTISEMENTS 7 The Ball of the Bears 7 All is not Gold that Glitters 7 Painting In Imitation of Rose-Wood 8 India Rubber 8 Communication on Atmospheric Resistance 8 The Conical Windlass* 8 Requisite Strength of Steam Boilers 8 Bagley's Gold Pens 8 The Humming Bird 8 (Illustrated articles are marked with an asterisk.) * * * * * [Illustration: POETRY] NATURE'S IMAGE OF WASHINGTON. BY MARSHALL S. PIKE, OF THE HARMONEONS