COMPOSITION OF STEEP WATER.
According to M. C. Leeuw, water in which malt has been steeped has the following composition:
Organic matter. 0.56 per cent.
Mineral matter. 0.52 "
----
Total dry matter. 1.08 "
----
Nitrogen. 0.033 "
The mineral matter consists of--
Potash. 0.193 "
Phosphoric acid. 0.031 "
Lime. 0.012 "
Soda. 0.047 "
Magnesia. 0.016 "
Sulphuric acid. 0.007 "
Oxide of iron. traces.
Chlorine and silica. 0.212 "
SCHREIBER'S APPARATUS FOR REVIVIFYING BONE-BLACK.
We give opposite illustrations of Schreiber's apparatus for revivifying bone-black or animal charcoal. The object of revivification is to render the black fit to be used again after it has lost its decolorizing properties through service--that is to say, to free its pores from the absorbed salts and insoluble compounds that have formed therein during the operation of sugar refining. There are two methods employed--fermentation and washing. At present the tendency is to abandon the former in order to proceed with as small a stock of black as possible, and to adopt the method of washing with water and acid in a rotary washer.