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"Device used for measuring the velocity of the wind." -Comstock 1850

Anemometer

"Device used for measuring the velocity of the wind." -Comstock 1850

"Machine designed by Atwood to allow the measurement and calculation of the velocities of falling bodies at various points accurately and easily." —Quackenbos 1859

Atwood's Machine

"Machine designed by Atwood to allow the measurement and calculation of the velocities of falling bodies…

"When a feather and a cent are dropped from the same height, the cent reaches jthe ground first. this is not because the cent is heavier, bu because the feather meets with more resistance from the air in proportion to its mass. If this resistance can be removed or equalized, the two bodies will fall equal distances in equal times, or with the same velocity. The resistance may be avoided by dropping them in a glass tube from which the air has been removed. The resistances may be nearly equalized by making the two falling bodies of the same size and shape bu of different weights, as in the preceding experiment." -Avery 1895

Velocities of Falling Bodies

"When a feather and a cent are dropped from the same height, the cent reaches jthe ground first. this…

A contrivance connected with mills, steam-engines, or other machinery, for maintaining uniform velocity with a varying resistance.

Governor

A contrivance connected with mills, steam-engines, or other machinery, for maintaining uniform velocity…

"The principle of increased velocity as bodies descend from a height, is curiously illustrated by pouring molasses or thick syrup from an elevation to the ground. The bulky stream, of perhaps two inches in diameter where it leaves the vessel, as it descends, is reduced to the size of a straw, or knitting-needle; but what it wants in bulk is made up in velocity, for the small stream at the ground will fill a vessel just as soon as the large one at the outlet." —Comstock, 1850

Increased Velocity

"The principle of increased velocity as bodies descend from a height, is curiously illustrated by pouring…

The aggregate of the components of momentum.

Components of Momentum

The aggregate of the components of momentum.

"From a cross piece, A, on a stout framework, a heavy block of wood, B, is suspended, in such a way as to move freely backward and forward. A ball fired into this block will drive it back to a distance proportioned to the ball's velocity. All other things being known, the ball's velocity can be discovered." —Quackenbos 1859

Ballistic Pendulum

"From a cross piece, A, on a stout framework, a heavy block of wood, B, is suspended, in such a way…

Two arrangements of pulley: crossed belt and uncrossed belt. The pulleys are constructed with two circles that have the radii labeled and tangent lines drawn (strings).

Pulley

Two arrangements of pulley: crossed belt and uncrossed belt. The pulleys are constructed with two circles…

This illustrates how to determine the force required to turn a connecting rod of a steam engine.

Connecting Rod of a Steam Engine

This illustrates how to determine the force required to turn a connecting rod of a steam engine.

"a, scroll-wheel, intermeshing with the pinion b, which, sliding by a feather on the shaft, c, imparts a gradually decreasing velocity to the latter as b is moved toward the center of a." -Whitney, 1911

Scroll Wheel

"a, scroll-wheel, intermeshing with the pinion b, which, sliding by a feather on the shaft, c, imparts…

Inclined plane forming right triangle showing the velocity of a body sliding a distance,s, down a smooth horizontal plane.

Inclined Plane Forming Right Triangle

Inclined plane forming right triangle showing the velocity of a body sliding a distance,s, down a smooth…

"If a vessel be filled with water, and three apertures be made in its sie at E F G, the fluid will be thrown out in jets, falling to the earth in the curved lines shown." -Comstock 1850

Water Velocity and Gravity

"If a vessel be filled with water, and three apertures be made in its sie at E F G, the fluid will be…