Magazine Camera

A box form of camera arranged to hold a dozen plates. A plate is brought into focal position by means of a button or release. After exposure the plate drops forward and falls to the bottom of the camera box, while another plate is brought into position for the next exposure.

Multiplying Camera

A multiplying camera is one so constructed that it is possible to make on one 5x7 plate, either four, nine, twelve, sixteen, twenty, thirty or forty-two exposures, as well as full cabinets. Generally known as a penny picture camera.

Camera Obscura

A dark chamber in which a ray of light is admitted by means of a small hole or lens. Figures of objects passing outside are projected onto a mirror which is placed at an angle of 45 degrees, and which, in turn, reflects the objects onto a white screen. If the mirror were not used the objects would be inverted.

Panoramic Camera

A camera so constructed as to include a very wide angle of view. Usually effected by swinging the lens during exposure, or by moving of the sensitive film, which is operated on a curved surface.

Photo-micrographic Camera

A camera attached to the microscope for photographing microscopic objects. (See Photo-micrography.)

Portrait Camera

A rigidly constructed camera, being especially designed for portrait work in the studio.

Reflex Camera

A camera in which a mirror is employed to throw a full-size image on a ground-glass at the top of the camera. thus enabling focusing to be done up to within an instant of making the exposure. The mirror is thrown out of position immediately preceding the exposure by the operation of pressing the button, which also releases the shutter.

Solar Camera

An apparatus consisting of an arrangement for enlarging in which the rays of the sun are used to illuminate the negative.

Stereoscopic Camera

A double camera fitted with two lenses, the centers of which are about 3 1/4 inches apart. The focal lengths of the lenses are equal. The size of the image projected by each lens is usually about 3 1/4 inches square.

Studio Camera

(See Camera, Portrait.)

Camera Stand

A table or support arranged to hold the camera.


C9H16CO. Gum camphor. White, translucent masses with numerous cracks; easily broken but difficult to powder. Soluble in alcohol, ether, chloroform, benzene; slightly soluble in water. Used in certain varnishes; sometimes added to gelatin, albumen, etc., to prevent decomposition. A small piece of camphor added to kerosene oil in a lamp increases the whiteness of the flame.

Canada Balsam

(See Balsam, Canada.)

Candle Power

The illuminating power of a sperm candle burning at the rate of 120 grains per hour.

Mounting on Canvas

Albumen or glossy prints as well as others are mounted on canvas for convenience in carrying, as they can then be handled quite carelessly without fear of being torn. The canvas should be sprinkled with water and then stretched upon a wooden frame, when the prints can be easily mounted by the use of any good starch paste. Ready prepared mounting canvas with paper on one side can be procured from regular dealers.