2493. Diamond Cement
Soak isinglass in water till it is soft; then dissolve it in the smallest possible quantity of proof spirit, by the aid of a gentle heat; in two ounces of this mixture dissolve ten grains of ammoniacum, and whilst still liquid add half a drachm of mastic, dissolved in three drachms of rectified spirit; stir well together, and put into small bottles for sale.
Directions for Use
.— Liquefy the cement by plunging the bottle in hot water, and use it directly. The cement improves the oftener the bottle is thus warmed; it resists the action of water and moisture perfectly.
2494. Rice Flour Cement
An excellent cement may be made from rice flour, which is at present used for that purpose in China and Japan. It is only necessary to mix the rice flour intimately with cold water, and gently simmer it over a fire, when it readily forms a delicate and durable cement, not only answering all the purposes of common paste, but admirably adapted for joining together paper, cards, &c., in forming the various beautiful and tasteful ornaments which afford much employment and amusement to the ladies. When made of the consistence of plaster-clay, models, busts, bas-relievos, &c., may be formed of it; and the articles, when dry, are susceptible of high polish, and are very durable.
2495. Using Egg
The white of an egg, well beaten with quicklime, and a small quantity of very old cheese, forms an excellent substitute for cement, when wanted in a hurry, either for broken china or old ornamental glassware.