The Glossary

A-berrations - the apparent displacement of a celestial object from its true position, caused by the relative motion of the observer and the object

Agitate- to move with force

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C-hemistry-the science that deals with the composition and properties of substances and various elementary forms of matter.

Camera-a boxlike device for holding a film or plate sensitive to light, having an aperture controlled by a shutter that, when opened, admits light enabling an object to be focused, usually by means of a lens, on the film or plate, thereby producing a photographic image.

Cellulose Nitrate-a nitric acid ester; used in lacquers and explosives

D-eveloper- A chemical agent used for treating photographic film to make a visible image

Dilute- Made thinner or weaker by having had water or another solvent added to it

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F-ixer- A substance used for fixing a photographic image

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P-hotography-the process or art of producing images of objects on sensitized surfaces by the chemical action of light or of other forms of radiant energy, as x-rays, gamma rays, or cosmic rays.

Pinnhole camera is a very simple camera with no lens and a single very small aperture. Simply explained, it is a light-proof box with a small hole in one side. Light from a scene passes through this single point and projects an inverted image on the opposite side of the box

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S-top bath- A bath for stopping the action of a preceding bath by neutralizing any of its chemical still presen

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