Show NEW EW LAW OF LONGEVITY Not only life Insurance experts but a great many other people also als have observed ob- ob in served rf families the longevity Some persons or Js the h have reverse r harder a runs d constitutions than thal others and they are apt to transmit them to their children A man both of whose parents were long- long Li lived Lied ed has as a promise of a good old age himself hImsel This of course Is an anold old story ae A much less familiar principle affecting the duration of life ha has been presented by Miss Mary Beeton of Cambridge and Prof Karl Pearson of of London in Its In a new periodical called caled A comparison was made between the length of oC lives of two adult adul brothers brother or two adult sisters to ascertain if there was a perceptible difference between I the older and younger members of a pair Figures here given gIven represent the average of over 1000 10 cases case and hence would seem to point to a general law It may be added that ge rl le aW the particular t persons so under Investigation n belonged to the Society of FIends Friends That organization placed Its Us records at the dis dis- dis pOal of Miss Beeton and Prof Pearson It I thus appears that the average age of the elder eider brother broter was years the younger brother 54 5 the elder sisters sister's and the younger sisters sister's There Is a difference of over four years in favor of oC the older adult brother or sister This does does- not no signify that that- the older brother or sister will wi survive the younger The mean moan interval between the of the members members' of all the paIrs under consideration consider consider- atlon aton was wa about six and a half years yer Hence Bence the older brother or sister would ordinarily die first though attaining a greater age The first inquiry here mentioned was limited to pairs the younger members of which attained the age of at least leat 21 21 O A second comparison was wa made that Included ed minors with wIh adults It I gave results closely resembling the other The mean access of life in 38 pairs pair's pairs was 4 46 6 years But the Interval between the births appears appears ap ap- ap- ap pears to exert some Influence ka kas ka's s contributors furnish a formula by a which ones one's expectations can be computed ed and adds Thus a brother born brn ten years year before another brother has probablY probably ably seven y years years' ts' ts greater duration of life A sister born bores ten years before another sister has probably about six years' years greater duration of life New New York bune New Tri Tn- rl |