condition--e.$., total volunie of titratcd iolution-must be reproduced prccisc,ly. Constarits for other coiiditioiis can be readily detcmiiiiird. LITERATURE CITED
(4) Iiolthoff, I. AI., Fiirman, K . H;: “Potentiometric Titrntionr, Kilev. S e w Tork. 1926. (5) Zbid., p i . 165-9. ’ (6) Zbid., pp. 148-50, 168-9. [ i )Kuster, F. W., 2. anory. t h e m . 19, 81 (1899). . (8) Levy, R., Compt. rend. 235, 882
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Se\V
York, 1!) 1
