ClipArt ETC
August Belmont: The Democratic Scapegoat for "Boss Tweed." The first cartoon in which the face of "Boss" Tweed appears.

August Belmont Democratic Scapegoat

August Belmont: The Democratic Scapegoat for "Boss Tweed." The first cartoon in which the face of "Boss"…

The typical representation of depression contours, if otherwise ambiguous, on a topographical map.

Depression Contours

The typical representation of depression contours, if otherwise ambiguous, on a topographical map.

Illustration showing an angle of depression from a horizontal line to a line of sight.

Angle of Depression

Illustration showing an angle of depression from a horizontal line to a line of sight.

"What a fall there was, my countrymen!" This picture from Nast depicts the wreck in Wall Street after Black Friday, September 24, 1869.

Black Friday in Wall Street

"What a fall there was, my countrymen!" This picture from Nast depicts the wreck in Wall Street after…

A Hollow is a land form where land falls on all sides to a minimum point.

Hollow

A Hollow is a land form where land falls on all sides to a minimum point.

A mark, indentation, figure, etc., produced by pressure.

Dental Cup for Impression

A mark, indentation, figure, etc., produced by pressure.

Illustration of a ladder leaning against the side of a building (wall) to form a right triangle .

Ladder Leaning Against a Building

Illustration of a ladder leaning against the side of a building (wall) to form a right triangle .

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a right triangle .

Ladder Leaning Against a Tree

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a…

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a right triangle .

Ladder Leaning Against a Tree

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a…

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a right triangle .

Ladder Leaning Against a Tree

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a…

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a right triangle .

Ladder Leaning Against a Tree

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a…

Illustration of 2 ladders leaning against opposite sides of a palm tree to form similar right triangles. The angles of elevation from the ground to where the ladders meet the tree are congruent. Illustration can be used for problems involving proportions.

2 Ladders Leaning Against a Tree

Illustration of 2 ladders leaning against opposite sides of a palm tree to form similar right triangles.…

"Two hoops of thin iron are placed upon an axis which passes through their poles. The two ends of each hoop cross each other at right angles, and are fastened together, and to the axis at the bottom. At the upper end they slide up and down on the axis, which is turned rapidly by wheel-work as represented. These hoops, before the motion begins, have an oval form, but when turned rapidly, the centrifugal force causes them to expand, or swell at the equator, while they are depressed at the poles, the two polar regions becoming no more distant than a and b." —Comstock, 1850

Pole Depression

"Two hoops of thin iron are placed upon an axis which passes through their poles. The two ends of each…

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to form a right triangle.

Leaning Tower

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to…