Mechanical, n.

The terms mechanical and chimical, are thus distinguished; those changes which bodies undergo without altering their constitution, that is, losing their identity, such as changes of place, of figure, &c. are mechanical; those which alter the constitution of bodies, making them different substances, as when flour, yeast and water unite to form bread, are chimical. In the one case, the changes relate to masses of matter, as the motions of the heavenly bodies, or the action of the wind on a ship under sail; in the other case, the changes occur between the particles of matter, as the action of heat in melting lead, or the union of sand and lime forming mortar. Most of what are usually called the mechanic arts, are partly mechanical, and partly chimical.