Where the current is to be concentrated in a manner still more energetic than that described, this can be effected by raising the objective part above the surface of the water, and then applying the surface board. In this way the _entire_ strength of the current is concentrated in one spot, whereas, when the surface board is applied under water, a large portion of current is absorbed by this. This appears to me the fittest place to say a few words in regard to the relative conductivity of the human body and water—the latter at the temperature ordinarily employed in baths, say from 90° to 95° Fahrenheit. BEARD and ROCKWELL, in their work on Medical and Surgical Electricity,[2] state that “the human body is a better conductor of electricity than water at the same temperature.” Certain phenomena connected with the administration of electric baths having forced upon me some doubts in this respect, I made very careful experiments, both with and without the aid of the galvanometer (Bradley’s Tangent), to satisfy these. Without wearying the reader with details, I will state that the result of my experiments leaves no room for doubt that water at the temperatures stated—and still more so at 98½°—is superior to the human body as a conductor of electricity. I do not mean to be understood that water is a better conductor than _every constituent_ of the human body; blood, for example, is a better conductor. But when I speak of the body in this connection, I take it as we find it practically, i.e., with the resistance of the skin, and especially the epidermis, superadded to internal resistances. I have no doubt that with a flayed individual it would be otherwise. I will add, that it will give me great pleasure to repeat these experiments, which are sufficiently simple, in the presence of any of my _confreres_ who feel an interest in the subject.