Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: duller one Because the first is transmitted by the solid ice, and the second through the air. Why do massive stone walls, and even the ground itself, responsively vibrate and tremble at particular notes in music or the sound of a powerful voice Because of the sympathy that exists between the sounds produced and the elastic subtle matter or fluid contained in the wall, and which seems to be universally diffused throughout animate and inanimate nature. HYDRODYNAMICS. Hydrostatics Amd Hydraulics. Hydrodynamics (from oJajj, water, and 3Wf;, power) is that branch of mechanical science which treats of the force and power of fluids, namely, their pressure, equilibrium, cohesion, and motion; and is subdivided into two parts, Hydrostatics and Hydraulics. Hydrostatics (compounded of two Greek words, signifying water and to stand, ) treats of the weight, pressure, equilibrium, and cohesion of fluids in a state of rest, and the phenomena of capillary attraction; and Hydraulics (from two Greek words, signifying water and a pipej investigates the laws which regulate the motion of fluids, as also their resistance and percussion, together with the artificial means of conducting liquids in pipes, or raising them in pumps, and the constructing of all kinds of machines relating to them. Hydrostatics And Hydraulics. What is meant by water finding its level Its natural law or tendency to stand at the same surface level in all parts of its mass. Why does water seek the lowest level for its repose BeCause of the force of gravity. Why does water run or flow This is a problem that is not in our present state of knowledge philosophically solvable; for the fluidity of water depends on the attraction of gravitation, which is one of the unveilable mysteries of Nature. Why ...