The period chosen is from the introduction of “The Criminal Lunatics Act, 1884,” to the end of the year 1896, and male cases only are considered.

Instructions.—Every medical certificate most be according to the subjoined form,∗ prescribed by the “Lunatics Care and Treatment,” and “Lunatic Asylums” Acts, 1853.

Mr. President and Gentlemen,—The fact of my having been frequently summoned as a medical witness in the civil and criminal courts of justice, in cases in which monomania has been alleged to exist, ana the examination of the evidence in two recent and important cases of disputed wills induces me to bring under the notice of the Medico-Psychological Association the present practice of the Courts in relation to monomania, and to attempt a concise description of this form of disease for consideration and discussion.

Attempts to find a function characteristic of schizophrenia which may be correlated with the electro-encephalogram have not been very fruitful. For example, in a group of 60 adult schizophrenics only a very slight positive correlation exists between the electrical activity of the brain and duration of illness (Rubin, unpublished observations). The same correlation obtains for duration of hospitalization. Although not systematically studied, there appears to be no correlation between the electro-encephalogram and diagnostic sub-type of schizophrenia.