Borosilicate glass, graduated. For the demonstration of the chemical composition of water by volume and the electrochemical equivalent of hydrogen by electrolysis of water. Platinum electrodes mounted in rubber stoppers are used for the electrolysis of acidified water but carbon electrodes must be used for ammonia solutions or hydrochloric acid (or another chloride containing solution). Stopcock and reservoir at apex of outer tubes and inner tube respectively. Outer limbs graduated 0-50 x 0-2 ml. Hoffman Voltameter only with one pair each of Carbon and Platinum electrodes without clamp and stand, with glass stopcock.
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