Mr. President and Gentlemen,—Whilst I feel very much honoured by the presence here to-day of the members of the Medico-Psychological Association of Great Britain and Ireland to listen to a paper from me on the “Cerebrospinal Axis as a Thermal Centre and Water Power,” I am, I confess, not a little anxious respecting the result of my labour. I know I stand before a body of listeners who, from their daily avocation as well as from their accomplished training in mental and physical science, form naturally the most critical audience I could address on the subject to be discussed, and this alone is a cause of grave concern. But there is something more before me. I am about to bring forward an entirely new line of research and observation in so elementary a stage that the simplicity of the thesis itself may, at first sight, seem to imperil its âceptance. I must, therefore, with special emphasis, claim, at the onset, your kindest indulgence.