ClipArt ETC
"From one end of a scale-beam, suspend a cylindrical metal bucket, b, with a solid cylinder, a, that fits accurately into it hanging below. Conterpoise with weights (shot or sand) in the opposite scale-pan. Immerse a in water, and the counterpoise will descend, as if a had lost some of its weight. Carefully fill b with water. It will hold exactly the quantity displaced by a. Equilibrium will be restored." -Avery 1895

Archimedies Principle

"From one end of a scale-beam, suspend a cylindrical metal bucket, b, with a solid cylinder, a, that…

"When two forces counteract, or balance each other out, they are said to be in equilibrium." -Comstock 1850

Equilibrium

"When two forces counteract, or balance each other out, they are said to be in equilibrium." -Comstock…

"A bar with weights attached that is in equilibrium." -Avery 1895

Bar and Weights in Equilibrium

"A bar with weights attached that is in equilibrium." -Avery 1895

"A bar with weights attached that is in equilibrium." -Avery 1895

Bar and Weights in Equilibrium

"A bar with weights attached that is in equilibrium." -Avery 1895

Diagram of epithelium in nervous region of ampulla of a semicircular canal of the ear. These canals are associated with the sense of equilibrium.

Equilibrium, Sense of

Diagram of epithelium in nervous region of ampulla of a semicircular canal of the ear. These canals…

Orthogonal projection of a closed plane-faced polyhedron.

Polyhedron

Orthogonal projection of a closed plane-faced polyhedron.

Orthogonal projection of a closed plane-faced polyhedron.

Polyhedron

Orthogonal projection of a closed plane-faced polyhedron.

"Suppose a number of vessels, of different shapes and sizes to have a communication between them, by means of a small tube, passing from the one to the other. If, now, one of these vessels be filled with water, or if water be poured into the tube A, all the other vessels will be filled at the same instant, up to the line B C. Therefore, the pressure of the water A, balances that in 1, 2, 3, while the pressure in each of these vessels is equal to that in the other, and so an equilibrium is produced throughout the whole series." —Comstock, 1850

Water Pressure

"Suppose a number of vessels, of different shapes and sizes to have a communication between them, by…

The instrument called the water-level illustrates the principle of equilibrium in vessels communicating with each other.

Water-level

The instrument called the water-level illustrates the principle of equilibrium in vessels communicating…