Abstract
In my previous paper in the 'Philosophical Transactions,' I have detailed the results of an investigation of the electromotive properties of the electrical organ of Torpedo marmorata , and I stated that I hoped to follow up the lines of inquiry indicated at various points in the account of that research. My previous work had been done in the winter (January, 1887), and I was anxious to re-open the investigation at a time of year when Torpedoes could be readily procured, were in the most favourable state, and could be kept alive without any difficulty. This I was enabled to do in October, 1887, through the kindness of the Society Scientifique d’Arcachon, who placed at my disposal the rooms I had occupied in the previous winter, and to whom and the Society’s Director, M. Duregne, I beg to offer my thanks for their aid.

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