Provides an easy means of generating a gas such as hydrogen. You will need, in addition to this generator: mossy zinc, hydrochloric acid, pneumatic trough, gas collection vessels like tubes or bottles, some rubber tubing and a short length of glass tubing. Complete instructions for generating hydrogen are provided with the generator. Includes bottle, two-hole stopper, thistle tube and bent glass tubing. Bottle capacity is 250 mL.