"An optical toy consisting of a vertical cylindrical mirror which gives a correct image of a distorted picture drawn at the base on a plane at right angles to axis of the mirror."-Whitney, 1902

Anamorphoscope

"An optical toy consisting of a vertical cylindrical mirror which gives a correct image of a distorted…

"A method of drawing which gives a distorted image of the object represented when it is viewed from directly or nearly so, but a natural image when it is viewed from a certain point, is reflected by a curved mirror, or is seen through a polyhedron."-Whitney, 1902

Anamorphosis

"A method of drawing which gives a distorted image of the object represented when it is viewed from…

"An optical instrument employed to facilitate the sketching of objects from nature by producing a reflected picture of them upon paper. Wollaston's apparatus is one of the commonest. The essential part is a totally-reflecting prism with four angles, one of which is 90 degrees, the opposite one 135 degrees, and the other two each 67 degrees. One of the two faces which contain the right angle is turned towards the object to be sketched." — Winston's Encyclopedia, 1919

Camera Lucida

"An optical instrument employed to facilitate the sketching of objects from nature by producing a reflected…

"An optical instrument employed for exhibiting the images of objects in their forms and colors, so that they may be traced and a picture drawn, or may be represented by photography. A simple camera obscura is presented by a darkened chamber into which no light is permitted to enter excepting by a small hole in the window-shutter. A picture of the objects opposite the hole will then be seen on the wall or on a white screen placed opposite the opening." — Winston's Encyclopedia, 1919

Camera Obscura

"An optical instrument employed for exhibiting the images of objects in their forms and colors, so that…

The first step to drawing a house. Begin with a basic drawing.

Drawing a House 1

The first step to drawing a house. Begin with a basic drawing.

The second step to drawing a house. It becomes slightly more elaborated.

Drawing a House 2

The second step to drawing a house. It becomes slightly more elaborated.

The third step to drawing a house. The drawing becomes further elaborated as it reaches completion.

Drawing a House 3

The third step to drawing a house. The drawing becomes further elaborated as it reaches completion.

A picture of a woman with a fancy hat, originally drawn by a 16 year old girl.

Woman in a Fancy Hat

A picture of a woman with a fancy hat, originally drawn by a 16 year old girl.

A sketch of the country side.

Landscape Sketch

A sketch of the country side.

An illustration of a large mansion.

Mansion

An illustration of a large mansion.

An illustration of two men drawing on the a sidewalk after measuring a distance.

Men Drawing on Sidewalk

An illustration of two men drawing on the a sidewalk after measuring a distance.

"A prophetic birds eye view of Ruhleben Prison Camp when the war ends."-1916; Drawing by Hobart Egremont, one of the interned.

Ruhleben Prison Camp

"A prophetic birds eye view of Ruhleben Prison Camp when the war ends."-1916; Drawing by Hobart Egremont,…

An illustration of an isometric sketch to show a three dimensional object. The sketch is useful in elevation drawing, plans, and laying out curve diagrams.

Isometric Sketch

An illustration of an isometric sketch to show a three dimensional object. The sketch is useful in elevation…

"It is a good plan to carry a sketch-book about with you."

Sketching

"It is a good plan to carry a sketch-book about with you."

Sketch of a 16 year old boys idea of what a valedictorian is.

Valedictorian

Sketch of a 16 year old boys idea of what a valedictorian is.

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

Vanishing Point

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

Vanishing Point

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

Vanishing Point

A vanishing point is a point in a perspective drawing to which parallel lines appear to converge.

An early helicopter concept.

Villard's Helicopter

An early helicopter concept.