2181. Masons' Cement for Coating the Insides of Cisterns

2181.    Masons' Cement for Coating the Insides of Cisterns. Take equal parts of quicklime, pulverized baked bricks, and wood ashes. Thoroughly mix the above substances, and dilute with sufficient olive oil to form a manageable paste. This cement immediately hardens in the air, and never cracks beneath the water.

2182. Colored Cements

2182.      Colored Cements. Professor Boettger prepares cement of different colors and great hardness by mixing various bases with soluble glass. Soluble soda glass of 33° Baume is to be thoroughly stirred and mixed with fine chalk, and the coloring matter (see 12 following receipts) well incorporated. In the course of 6 or 8 hours a hard cement will set, which is capable of a great variety of uses. As soluble glass can be kept on hand in liquid form, and the chalk and coloring matters are permanent and cheap, the colored cements can be readily prepared when wanted, and the material can be kept in stock, ready for use, at but little expense. Boettger recommends the following coloring matters:

2183. Black Cement

2183.     Black Cement. "Well sifted sulphide of antimony, mixed with soluble glass and chalk (see No. 2182 (Colored Cements)), gives a black mass, which, after solidifying, can be polished or burnished with agate, and then possesses a fine metallic lustre.

2184. Grey-Black Cement

2184.    Grey-Black Cement. Pine iron dust, mixed as in No. 2182, gives a grey-black cement.

2185. Grey Cement

2185.    Grey Cement. Zinc dust. This, used as in No. 2182, makes a grey mass, exceedingly hard, which, on polishing, exhibits a brilliant metallic lustre of zinc, so that broken or defective zinc castings may be mended and restored by a cement that might be called a cold zinc casting. It adheres firmly to metal, stone, and wood.

2186. Bright Green Cement

2186.    Bright Green Cement. Carbonate of copper, used according to No. 2182, gives a bright green cement.

2187. Dark Green Cement

2187.    Dark Green Cement. Sesqui-oxide of chromium, mixed as in No. 2182, gives a dark green cement.

2188. Blue Cement

2188.    Blue Cement. Th'enard's blue, used as in No. 2182, makes a blue cement.

2189. Yellow Cement

2189.    Yellow Cement. Litharge, with soluble glass, etc., see No. 2182 (Colored Cements), gives a yellow cement.

2190. Bright Red Cement

2190.    Bright Red Cement. Cinnabar, used as directed in No. 2182, makes a bright red cement.

2191. Violet Bed Cement

2191.    Violet Bed Cement. Carmine, used as in No. 2182, yields a violet red cement.

2192. White Cement

2192.    White Cement. The soluble glass with fine chalk alone (see No. 2182 (Colored Cements)) gives a white cement of great beauty and hardness.