MISCELLANY. 
171 
it hardens ; when moist, it is elastic. The material which was found to 
give the best mixture for casts, was finely pulverized slate. Silica, 
emery, &c, give pastes which harden, and may be used for razor strops. 
In making casts of the mixture of tannate, of gelatine, and pulverized slate, 
it must be left for a certain time in the mould, in order to preserve the 
impression. If, however, it is allowed to remain there too long, it ad- 
heres strongly. The only difficulty in the application, is to ascertain the 
precise time required for due hardening. 
Journ. Frank. Inst, and Journ. Conn. Usuelles. 
Orange and Lemon Syrups. — The following recipes, it is said, will 
afford syrups that possess the same flavour as those made with the fresh 
fruit : 
1 . Tincture of Orange Peel. 
Fresh orange peel, the inner white portion being entirely removed. 
Alcohol at 22° sufficient to cover the orange peel. 
Introduce into a glass stoppered bottle, and keep in a cool place. 
2. Tincture of Lemon Peel. 
Fresh lemon peel, the white portion removed. 
Alcohol at 30°, q. s. 
Prepare as before. 
3. Artificial Orange Juice. 
Citric acid, gss. 
Distilled water, giv. Dissolve and add, 
Tincture orange peel, gij. 
4. Artificial Lemon Juice. 
Citric acid, ^ij. 
Distilled water, ^iv. Dissolve and add, 
Tincture lemon peel. giss. 
5. Orange Syrup. 
Citric acid, giv. 
Distilled water, gij. Dissolve and add, 
Simple syrup, lb. viij. 
Tincture orange peel. gij. 
6. Lemon Syrup. 
Citric acid, ^iss. 
Distilled water, |iv. Dissolve and add, 
Simple syrup, lbs. viij. 
Tincture lemon peel, 3iv. 
IbM. 
