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English Pleasure Carriages. With an Analysis of the Construction of the Common Roads and Railroads, and the Public Vehicles Used on Them
English Pleasure Carriages With an Analysis of the Construction of the Common Roads and Railroads and the Public Vehicles Used on Them Author:William Bridges Adams General Books publication date: 2009 Original publication date: 1837 Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million book... more »s for free. Excerpt: CHAPTER III. Definition of Wheel Carriages. -- Primary and Secondary. -- Animal and Elemental Power. -- Elasticity and Gravity. -- Examples. -- Mechanical Powers. -- Lever. -- Wheel and Axis. -- Pulley. -- Inclined Plane. -- Wedge. -- Screw. -- Funicular Action. -- Hydrostatical Action. -- Automatical Action. -- Ponderatical Action. -- Geometrical Forms in Carriages. A Wheel Carriage moved by internal action, as when steam power is combined with it, may be defined -- a primary machine for the purpose of locomotion. A wheel carriage moved by external action may be defined -- a secondary machine for the purpose of locomotion. A machine, properly so called, is a material combination of two or more of the means designated by mechanicians as " mechanical powers," whereby the forces known as animal and elemental power may be transmitted to other bodies with various modifications, for the purpose of producing motion in them. Animal and elemental power may be divided into two classes: that which acts by the force of elasticity, and that which acts by the force of gravity. The author has retained this old term on account of its familiarity to the general reader, though savouring of the quaintnesses of the antique chemistry, now exploded. When a horse is used for the purposes of draught, part of his power consists in the elastic action of his muscles, which serve to throw his body forward, as when he first bends and then straightens his limbs; and part of it in gravity, as when he hangs his body forward against the traces after the expansive muscular action is expended. For this reason a heavy horse can ...« less