This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
An instrument for viewing stereoscopic views.
Two views made from slightly different view-points of one particular subject and mounted side by side on one mount. Generally made with two lenses in the one camera, with the lenses mounted 3 1/4 inches apart. When viewed through a stereoscope the appearance is that of the natural relief as seen when viewing the subject from the same view-point as that from which the view was made.
(See Lens, Stigmatic.)
(See Solution, Stock.)
Bottles containing acids and strong alkaline solutions should be fitted with glass stoppers in preference to rubber or cork. Glass stoppers can be made to fit in the neck of bottles by grinding them in with a little fine emery powder paste. Many times glass stoppers will stick tightly in the bottle. (See Bottle Stoppers, To Loosen, for methods of removing stoppers from bottles.)
Properly speaking, the room in which the photographer makes portraits, erroneously called the operating-room. The length of the studio must be in accordance with the length of the focus of the lens employed. When selecting lenses the focal length must be that which will give the best results in that particular room. (See Skylight.)
(See Silver Sub-Chloride.)
(See Silver Sub-Iodide.)
(See Mercuric Chloride.)
This coating is applied in order to make the emulsion adhere evenly to the surface of the glass or paper.
(See Lead Acetate.)
(See Barium Sulphate.)
(See Calcium Sulphate.)
Sulphide of Ammonium. (See Ammonium Sulphide.)
(See Potassium Sulphide.)
(See Sodium Sulphite.)
(See Carbon Disulphide.)