Читать книгу Henley's Formulas, Recipes and Processes (Applied Chemistry) - Various - Страница 651

—Calcium carbide is known to possess a very unpleasant odor because it constantly develops small quantities of impure acetylene in contact with the moisture of the air. Le Roy, of Rouen, proposes for portable—especially bicycle—lamps, in which the evil is more noticeable than in large plants, simply to pour some petroleum over the carbide and to pour off the remainder not absorbed. The petroleum, to which it is well to add some nitro-benzol (mirbane essence), prevents the access of air to the carbide, but permits a very satisfactory generation of gas on admission of water.

CALCIUM SULPHIDE (LUMINOUS): See Paints.

CALFSKIN: See Leather.

CAMERA RENOVATION: See Photography.