Made of soda glass, all joints being ground glass. Comprises three chambers, a lower acid reservoir with glass stopper, a central bulb to which stopcock is fitted, an upper bulb with a tapered tube extending downwards into the reservoir and a safety funnel. A rubber separator prevents the solid reactant in the central bulb from failing into the reservoir.

Capacity:

(a) 250

(b) 500

(c) 1000ml.