In 1872, a select committee of the House of Commons, appointed "to consider the best plan for the control and management of habitual drunkards," called upon some of the most eminent medical men in Great Britain to give their testimony in answer to a large number of questions, embracing every topic within the range of inquiry, from the pathology of inebriation to the practical usefulness of prohibitory laws. In this testimony much was said about the effect of alcoholic stimulation on the mental condition and moral character. One physician, Dr. James Crichton Brown, who, in ten years' experience as superintendent of lunatic asylums, has paid special attention to the relations of habitual drunkenness to insanity, having carefully examined five hundred cases, testified that alcohol, taken in excess, produced different forms of mental disease, of which he mentioned four classes: 1. _Mania a potu_, or alcoholic mania. 2. The monomania of suspicion. 3. Chronic alcoholism, characterized by failure of the memory and power of judgment, with partial paralysis--generally ending fatally. 4. Dypsomania, or an _irresistible_ craving for alcoholic stimulants, occuring very frequently, paroxysmally, and with constant liability to periodical exacerbations, when the craving becomes altogether uncontrollable. Of this latter form of disease, he says: "This is invariably associated with a certain _impairment of the intellect, and of the affections and the moral powers_." Dr. Alexander Peddie, a physician of over thirty-seven years' practice in Edinburgh, gave, in his evidence, many remarkable instances of the moral perversions that followed continued drinking. RELATION BETWEEN INSANITY AND DRUNKENNESS. Dr. John Nugent said that his experience of twenty-six years among lunatics, led him to believe that there is a very close relation between the results of the abuse of alcohol and insanity. The population of Ireland had decreased, he said, two millions in twenty-five years, but there was the same amount of insanity now that there was before. He attributed this, in a great measure, to indulgence in drink. Dr. Arthur Mitchell, Commissioner of Lunacy for Scotland, testified that the excessive use of alcohol caused a large amount of the lunacy, crime and pauperism of that country. In some men, he said, habitual drinking leads to other diseases than insanity, because the effect is always in the direction of the proclivity, but it is certain that there are many in whom there is a clear proclivity to insanity, _who would escape that dreadful consummation but for drinking; excessive drinking in many persons determining the insanity to which they are, at any rate, predisposed_. The children of drunkards, he further said, are in a larger proportion idiotic than other children, and in a larger proportion become themselves drunkards; they are also in a larger proportion liable to the ordinary forms of acquired insanity.