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<p>Misunderstanding has arisen concerning the volume effect in the silver voltameter, and some writers have even questioned its reality. A large quantity of data is therefore given to prove the existence of the effect and to explain the cause of it. The results are divided into three classes. The first class includes a number of voltameter determinations made with the ordinary commercially pure silver nitrate. In the second class the salt used was tested by means of potassium permanganate for reducing substances and was also tested for acidity and found satisfactory. The third class of results includes cases in which the electrolyte was purposely contaminated. The forms of voltameter used were the porous-cup, the Kohlrausch, t
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<br>Subjects: electrolysis; measurements and use of instruments; Electrical instruments and techniques</div>
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