One hundred kilos. of waste jute scraps are first of all treated in
the manner usually employed in the paper industry; 15 per cent. of
quicklime is added, and they are treated for 10 hours at a pressure of
1½ atmospheres. The scraps are then freed from water by means of a
hydro-extractor, or a press, and finally saturated with chlorine in a
gas chamber for 24 hours or less, according to the requirements of the
case. Every 100 kilos. of jute requires 75 kilos. of hydrochloric acid
(20° B.) and 20 kilos. of manganese peroxide (78-80 per cent.).

The jute then takes an orange color, and is subsequently washed in a
tank, a kilo. of caustic soda being added per 100 kilos. of jute; this
amount of alkali is sufficient to dissolve the pigment, which colors
the water flowing from the washer a deep brown. After washing, the
jute can be completely bleached by the use of 5-7 kilos. of bleaching
powder per 100 kilos. of jute.--_Mon. de la Teinture_.

* * * * *




THE INDEPENDENT--STORAGE OR PRIMARY BATTERY--SYSTEM OF ELECTRIC MOTIVE
POWER.[1]

[Footnote 1: Abstract of a paper read before the American Streel
Railway Association, Oct. 23, 1891.]

By KNIGHT NEFTEL.