of a 5 per cent solution of thorium nitrate is added. Zinc electrodes are employed in the electrophoresis. In another example, 4 gms. of zinc oxide and 6 gms. of sulphur are suspended in 40 c.c. of water containing a protective colloid such as gum arabic. The suspension is introduced ...
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and completing the decomposition with magnesium bicarbonate, preferably whilst maintaining the initially precipitated zinc oxide in suspension, a product containing excess of zinc oxide is formed; whilst by neutralizing the initial zincate solution with magnesium bicarbonate prior to effecting its ...