Frame used to on tables.

Rectangular Frame for Table Tops

Frame used to on tables.

A front and side view of a t square with rectangular head. The t square is used draw straight lines using the blade in mechanical drawing.

Fixed Rectangular Head T Square

A front and side view of a t square with rectangular head. The t square is used draw straight lines…

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the nut and thumb screw arranged as shown; the movable swivel head being used the least." —Grimshaw, 1902

Adjustable Rectangular Head T Square

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the…

"The axes or edges, CG and CD, are foreshortened a like amount, while CB is foreshortened twice that of the other two. The angles of these axes being known and the reduced scale due to the foreshortening being given, the making of the projection is very simple." —Anthony, 1904

Axonometric Projection of a Rectangular Cube

"The axes or edges, CG and CD, are foreshortened a like amount, while CB is foreshortened twice that…

A rectangular cube drawn by using oblique projection. The original cube was projected parallel at a certain angle. The cube was drawn by drawing the front square in the front, then projecting it in an angle while connecting the edges.

Oblique Projection of a Rectangular Cube

A rectangular cube drawn by using oblique projection. The original cube was projected parallel at a…

The development, or unfolded prism, of the rectangular pyramid. The sides of the prism is joined at point E for reference, and the shape of the sides are by using the reference point.

Development of Rectangle Pyramid

The development, or unfolded prism, of the rectangular pyramid. The sides of the prism is joined at…

A development, or rolled out image, of two cylinders intersecting each other. The large rectangular diagram is the main cylindrical body with a circle inside it for the other cylinder. The smaller development is the intersected cylinder. This is commonly used to illustrate pipes.

Development of Two Intersecting Cylinder

A development, or rolled out image, of two cylinders intersecting each other. The large rectangular…

Boxes may be made of durable material such as wood or metal, or of corrugated fiberboard, paperboard, or other non durable materials.

Rectangular Box

Boxes may be made of durable material such as wood or metal, or of corrugated fiberboard, paperboard,…

This box is a container for permanent use as storage or transporting contents.

Rectangular Box

This box is a container for permanent use as storage or transporting contents.

A usually rectangular piece of luggage esp. for carrying clothes while traveling.

Business Purpose Suitcase

A usually rectangular piece of luggage esp. for carrying clothes while traveling.

"The section of the flume is usually rectangular, but it may be of a V shape, and occasionally, as in California, it is semicircular, this latter form requiring least lumber, but necessitating the use of iron bands or brackets."—Government Printing Office, 1897

Combined Wood and Iron Flume

"The section of the flume is usually rectangular, but it may be of a V shape, and occasionally, as in…

A style of chair designed by Thomas Sheraton. This chair takes on a rectangular back.

Sheraton Chair 2

A style of chair designed by Thomas Sheraton. This chair takes on a rectangular back.

An aquarium is a glass tank for live fish, plants, and the like. Pictured is a rectangular glass aquarium.

Rectangular Glass Aquarium

An aquarium is a glass tank for live fish, plants, and the like. Pictured is a rectangular glass aquarium.

A weir is a rectangular orifice that is used to measure water discharge. In this example, the top of the weir is level with the top of the top of the box it is on.

Weir

A weir is a rectangular orifice that is used to measure water discharge. In this example, the top of…

A weir is a fancy name for a rectangular opening. Some even give it another name: rectangular notch.

Weir

A weir is a fancy name for a rectangular opening. Some even give it another name: rectangular notch.

This form shows the planes given on a crystal of hydrous nickel sulphate: the basal pinacoid, (c); three pyramids of the second order, (m), (o), and (q); two pyramids of the first order, (n) and (p); and the prisms of the first and second orders, (r) and (s).

Hydrous Nickel Sulphate

This form shows the planes given on a crystal of hydrous nickel sulphate: the basal pinacoid, (c); three…

This figure shows a combination of forms sometimes observed on the silicate Scapolite, with the unit pyramid, (o); the prisms of the first and second orders, (M) and (b) respectively; and the pyramid of the third order, (s).

Scapolite

This figure shows a combination of forms sometimes observed on the silicate Scapolite, with the unit…

This crystal is mainly terminated by a rhombohedron of the third order, (x). With this form are associated the prisms of the first and the second order, (m) and (a); another rhombohedron of the third order, (s), and the two rhombohedrons of the first order, (r).

Phenacite

This crystal is mainly terminated by a rhombohedron of the third order, (x). With this form are associated…

This crystal of Tourmaline exhibits hemimorphism  in the direction of the vertical axis. Its forms are the prisms, (g), which as a result of hemimorphism, appear as a trigonal prism, and (a); the scalenohedron, (s), and the two rhombohedrons, (R) and (r), at the antilogue pole, while only (R) occurs at the analogue pole.

Tourmaline

This crystal of Tourmaline exhibits hemimorphism in the direction of the vertical axis. Its forms are…

This image shows one of Friedrich Froebel's divided cube (this one divided into many smaller cubes and prisms). Froebel's cubes were used to encourage creativity in kindergarten-age children. The children could rearrange the smaller shapes into combinations that showed life, knowledge, and beauty.

Froebel's Divided Cube (Complex)

This image shows one of Friedrich Froebel's divided cube (this one divided into many smaller cubes and…

These Hargrave box kites are named so after their inventor, Lawrence Hargrave of Sydney. These kites generally have two rectangular cells covered with nainsook cloth, except at the top and bottom, and one is secured above the other by four or more sticks. Some of these kites stand 9 ft. high, have 70 sq. ft. of lifting surface, and weigh only eleven pounds.The kites can be flown singly or in tandem.

Hargrave Kite

These Hargrave box kites are named so after their inventor, Lawrence Hargrave of Sydney. These kites…

Changing from polar to rectangular coordinates.

Rectangular Coordinates

Changing from polar to rectangular coordinates.

Transforming from one set of rectangular axes to another with the same origin, but different direction.

Rectangular Axes

Transforming from one set of rectangular axes to another with the same origin, but different direction.

"...a tube with a slit at the further end through which the light enters, and at the other end a collimating lens which brings the rays into a parallel beam (the slit is formed between two parallel edges the distance between which can be varied at will)..." —Whitney, 1889

Prism Spectroscope from the Late 19th Century

"...a tube with a slit at the further end through which the light enters, and at the other end a collimating…

"...an instrument which gives a spectrum when the source of the light is in a straight line with the eye—that is, which gives dispersion without deviation—is called a direct vision spectroscope..." —Whitney, 1889

Direct Vision Spectroscope

"...an instrument which gives a spectrum when the source of the light is in a straight line with the…

This divider has leaves and small round kernels featured in a design on the sides. The center area has rays coming out from a blank, rectangular center. It can be used as a divider or banner.

Divider with Leaves and Sun Rays

This divider has leaves and small round kernels featured in a design on the sides. The center area has…