Science Source December 28, 2009 DVD

An alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists searched for formulas t...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration entitled "sublimatio" from an alchemical treatise from 1622. In alchemy, sublimation is the process whereby a substance is heated to a...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. The title reads "exaltatio." Alchemy was the pseudo-scientific predecessor of chemistry. Among...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1616. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1616. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

The title page from an alchemical treatise from 1674 called De Groene Leeuw of Het Licht der Philosophen. Alchemy was the pseudo-scientific predecesso...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1674. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

An illustration from an alchemical treatise from 1622. Alchemy was the pseudo-scientific predecessor of chemistry. Among other pursuits, alchemists se...

Colorless or white light as perceived by human eye actually consists of many colors or wavelengths of light. Photographed here is a beam of white ligh...

Marsh habitat restoration in progress sign, Don Edwards San Francisco Bay National Wildlife Refuge, Alviso, California, USA. The Environmental Educati...

The Magdeburg hemispheres were invented in 1650 by Otto von Guericke, a scientist and the mayor of Magdeburg. He used them to demonstrate the concept...

A plane-convex (positive) lens is placed curved side-up on a paper with a square grid pattern. The apparent distortion of the pattern is called barrel...

A plane-convex (positive) lens is placed curved side-down on a paper with a square grid pattern. The apparent distortion of the pattern is called pinc...

A plane-concave (negative) lens is placed curved side-up on a paper with a square grid pattern. The apparent distortion of the pattern is called pincu...

A plane-concave (negative) cylindrical lens is placed curved side-up on a paper with a square grid pattern. The cylinder axis is horizontal. The horiz...

A convex-convex (positive) cylindrical lens is placed on a paper with a square grid pattern. The cylinder axis is vertical. The vertical lines are app...

Beam of light refracted by a positive cylindrical lens.

Beam of light refracted by a negative cylindrical lens.

Colorless or white light as perceived by human eye actually consists of many colors or wavelengths of light. Shown here is a beam of white light passi...

Colorless or white light as perceived by human eye actually consists of many colors or wavelengths of light. Shown here is a beam of white light passi...

When light is incident on an interface between a more optically dense medium and a less optically dense medium and the angle of incidence exceeds a ce...

A surface exhibits diffuse reflection if light incident from a single direction is reflected in a broad range of directions. In this photograph a beam...

A surface exhibits specular reflection if light incident from a single direction is predominantly reflected along a single direction, with the angles...

A surface exhibits specular reflection if light incident from a single direction is predominantly reflected along a single direction, with the angles...

Colorless or white light as perceived by human eye actually consists of many colors or wavelengths of light. In this photo a beam of white light is in...

A bottle of HPLC-grade methanol, manufactured by Baker.

A bottle of HPLC-grade acetone, manufactured by Baker.

Millimeter-inch ruler.

Silica gel is a granular, glass-looking, highly porous form of silica. Silica gel is often used to absorb moisture in small enclosed environments, for...

Solder is widely used in electronics for joining metallic conductors to ensure electrical continuity. Solders are typically metal alloys that have spe...

Twisted pair cable has two individually insulated conductors (wires) that are twisted together. Such construction is beneficial for signal transmissio...

A 3-phase electrical cable shown here has three individually insulated conductors (wires) enclosed by a protective insulating jacket. The insulation o...