### Prism With Square Bases

Prism with square bases.

### Triangular prism

A triangular prism.

### Prism Showing Volume

Illustration of a prism used to demonstrate that the volume of any prism is equal to the product of…

### Volume of Prismatoid

Diagram used to prove the theorem: "The volume of a prismatoid is equal to the product of one-sixth…

### 4 Congruent Rectangular Prisms

Illustration of 4 congruent rectangular prisms placed in the shape of a square. They are arranged to…

### Equal Prisms

Illustration showing two prisms are equal if the three faces which include a trihedral angle of the…

### Oblique Prism Truncated Into 3 Sections

Illustration of an oblique prism constructed by the combination of three truncated prisms.

### Rectangular prisms

Illustration of 2 parallelopipeds/rectangular prisms.

### Rectangular prisms

Illustration of 3 parallelopipeds/rectangular prisms.

### Rectangular Prisms Showing Volume

Illustration of 2 rectangular prism used to show volume.

### Two Equal Prisms

Diagram used to prove the theorem: "Two prisms are equal when the three faces about a trihedral of one…

### Development Exercise of Hexagonal Pyramid

A sample exercise problem in completing the top part of the hexagonal pyramid and to create a development,…

### Development Exercise of Oblique Hexagonal Pyramid

A sample exercise problem to complete the top part and create a stretched out image of the oblique hexagonal…

### Development Exercise of Pentagonal Pyramid

A pentagonal pyramid problem exercise to complete the top view of the image, and development, or rolled…

### Development Exercise of Pentagonal Pyramid

The problem exercise in completing the top view and creating the development, or rolled out, image of…

### Isometric of Oblique Pentagonal Pyramid

Illustration of the isometric of an oblique pentagonal pyramid.

### Oblique Pentagonal Pyramid

Illustration of a plan and elevation of an oblique pentagonal pyramid.

### Triangular Pyramid For Volume

Illustration of triangular pyramid used to show that the volume is the limit of the sum of the volumes…

### Rainbow Diagram

A bow of prismatic colors formed from the reflection and refraction of the sun and water. In the diagram,…

### Volume Of A Rectangular Solid

Illustration of a 5 in. by 3 in. by 4 in. rectangular solid with each cube in the solid representing…

### Similar Rectangular Solids

Illustration of a 1 in. by 2 in. by 1 in. rectangular solid that is similar to a 2 in. by 4 in. by 2…

### Reflecting Prism

"Fresnel next conceived the admirable improvement of employing the principle of "total" or internal…

### Prismatic Reflector

"Enlarged view of prism of prismatic reflector." —Croft 1917

### Prismatic Reflector

"Cross-section of prismatic reflector, showing how light rays are refracted and dispersed." —Croft…

### Refraction of Complimentary Colors

"The prism will deflect the red and orange, and form a reddish colored image at n. The violet, indigo,…

### Rhombohedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Scapolite

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

### Prism of the second order

"This is a form consisting of six rectangular vertical faces, each of which intersects two of the horizontal…

### Second Right Square Prism

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Prism With Semicircular Top

Isometric of a prism with a semicircular top.

### Six-sided Pyramid

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Solar Spectrum

"Solar Spectrum.—If a ray, proceeding from the sun, be admitted into a darkened chamber, through…

### Oblique View Of Rectangular Solid

Illustration of an oblique view of a rectangular solid/prism at 30°.

### Oblique View Of Rectangular Solid

Illustration of an oblique view of a rectangular solid/prism at 45°.

### Oblique View Of Rectangular Solid

Illustration of an oblique view of a rectangular solid/prism at 60°.

### Rectangular Solid

An illustration of a rectangular solid/prism.

### Combination of Geometric Solids

Illustration of model created by combining non regular geometric solids.

### Spectrometer

"An instrument used chiefly to measure the angular deviation of light rays in passing through a prism,…

### Spectroscope

"C. Collimator; P, center of group of prisms; T, telescope; s, slit through which the ray of light enters,…

### Direct Vision Spectroscope

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

### Color Spectrum

"A prism is used to disperse ordinary light, and slits are cut in paper S to only allow yellow and blue…

### Isometric of Stairs

Illustration of stairs; 3-dimensional view of 4 steps. The staircase can be created by combining/stacking…

### Staurolite

"Orthohombic. Habit prismatic, showing usually a combination of prism with large angle, brachypinacoid,…

### Stevensons Revolving Light

"In 1835 Mr. Stevenson, in a report to the Northern Lighthouse Board, proposed to add fixed reflecting…

### Straight Prisms

"Condensing Straight Prisms.—These, either by reflexion or refraction or both, cause a ray fr…

### Swans Designs

"Professor Swan's Designs.—Among several ingenious arrangements and new forms of agents proposed…

### Development Exercise of Cylinder using Three Piece Elbow

The exercise problem of creating a three piece elbow development or rolled out image of the cylinder…

### Tourmaline

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

### Projections of Triangular Prism

Projections of a triangular prism or block.

### Projections of Triangular Prism With Hole

Projections of a triangular prism or block with a square hole.

### Development Exercise of Triangular Pyramid

Exercise problem to develop, or rolled out, image of the triangular pyramid by creating an equal length…

### Volume of Triangular Pyramid

Diagram used to prove the theorem: "The volume of a triangular pyramid is equal to one third of a triangular…

### Twin Prism

"Condensing Twin Prism Light.—Part of the Lamiash light in the Firth of Clyde. Its action will…

### Union of a Pyramid and a Prism of Different Orders

This illustration shows the union of a pyramid and a prism of different orders.

### Union of a Pyramid and a Prism of the Same Order

This illustration shows the union of a pyramid and a prism of the same order.

### Vesuvianite

"Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second…

### Vesuvianite

This form shows a very complex combination of thirteen tetragonal forms occuring on the mineral Vesuvianite:…

### Yttrium Niobate

Also known as Fergusonite, this crystal shows the basal pinacoid, (c); the unit pyramid, (s); and the…

### Zincite

"A crystal of zincite with a prism terminated by a pyramid above a basal pinacoid below." — Ford,…

### Zircon

"Zircon, a mineral composed of of zirconium silicate, sometimes used as a gem-stone... THe mineral crystallizes…