Hoffman-s-Voltmeter-Apparatus-RVFM-CH0740B-Hoffman-s-apparatus-is-used-for-demonstrating-the-decomposition-of-water-determination-of-chemical-composition-by-electrolysis-&-has-applications-in-the-evaluation-of-the-electrochemical-equivalent-of-hydrogen-The-glass-unit-has-two-connected-limbs-each-of-Approx.-50ml-capacity-graduated-2-to-50ml-integral-reservoir-tube-&-funnel-shaped-bulb-with-a-stopcock-at-the-top-of-each-limb-RVFM-Hoffman-s-Complete