Show INSANITY AND J. Bishop professor of chemistry in Mc-Master in an article in the Independent observes that the subject of heredity exercises a great fascination for the majority of who naturally delight in tracing its effects in their own It can hardly be doubted- that much of our interest in heredity arises from its mixture of regularities and We are all familiar with children who are almost exact duplicates of one or exhibit the parental traits in practically In Kiich Mi It ls evident that such questions can only be solved by extending over a wide prolonged range of Individual aV During the past few years a very large amo has been devoted to the investigation of of animals In this As varieties a it has been In many to ascertain the factors or which regulate the from influences parent to of such features as the color of eyes and hair or tie markings of fur or Similar work has been done in the case of including wheat and Probably all of these recent researches have arisen from the work carried out by De In De Vries' in so far as they are of general had actually been discovered by Mendel about but at that time the world was unable to appreciate or profit by Men-del's and for about forty breeders continued to allow themselves to be influenced by many of which were without foundation in The application of the known laws of heredity to human beings is a matter or extreme aside altogether from any question of controlling the mere collection of data ls anything but a simple How many of for could give reliable Information regarding the color of eyes and the height and the cause of death and the length of life of all four of our grandparents and of each of their Yet such information touches but little more than the fringe of the In spite of these and of numerous other is heing made steadily even though and some very interesting results in connection with feeblemindedness and certain forms of insanity have been communicated recently by Cannon and That nervous and mental diseases aro often transmitted by heredity has been known since the- time of but the exact conditions of such inheritance have not hitherto been The results of the Investigations under consideration are expressed as follows by Professor Insanity will be inherited by all the children if both parents are When one parent Is insane and the other is hut has the Insanity taint from one half the children will be Insane and half will be but all will he capable or transmitting the insanity taint to their If one parent is Insane and the other is normal and of normal all the children will be but they will be capable of transmitting the insanity to their i If both parents aro normal but each inherits the insanity taint from one one-fourth of the children be normal and will bo incapable of transmitting the insanity to their one-fourth of the children will be the remaining half of the children will be but will transmit the insanity taint to their Both parents being one having a pure normal Vestry and the other with the Insanity taint from one all the children will be normal and only hair f will be capable of transmitting the insanity taint 10 their descendants and of pure- normal When both parents arc normal t will not be all the children will be normal and of transmitting an insanity taint to their Insanity sake of simplicity and brevity the word ha feeble teen used In the foregoing paragraphs to Include S mindedness as well as certain-but not all-forms of mental studies toe Importance of such a body of 2 f They for the first of 1 dedUCtions which may e Va ue the scientific data I Jl and to the Such with the only TZ tW WayS' They furnis us they L I matters of and 6 tion wS which has for its T for efficient legislation object the diminution of |