Hoffman's Voltameter, ‘Sciencent’, to demonstrate that H2O consists of two volumes of Hydrogen and one volume of Oxygen with 50 ml. graduated limbs and removable platinum electrodes

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• Hoffman's Voltameter, ‘Sciencent’, to demonstrate that H2O consists of two volumes of Hydrogen and one volume of Oxygen with 50 ml. graduated limbs and removable platinum electrodes