62 HEREDITY IN RELATION TO EUGENICS 



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Fig. 28. — Pedigree of a pedigree-complex (Abbott-Buck-Wolff) showing 

 inheritance of musical (dots), literary (horizontal hnes) and inventive (vertical 

 lines) ability. Variations in the area covered by each symbol indicate roughly 

 a variation in degree of abiUty of the given kind. I, 1, a musician of the 

 eighteenth century and I, 2, his wife, the daughter of a professor of music. 

 One of his sons adopted a seafaring life and died in Mozambique. Two sons, 



II, 8, 11, were instructors in the Geneva Conservatory of Music. The son, 



III, 21, of one of these was a professor of music and a composer. The other 

 married a woman, II, 7, with literary and musical ability and had four chil- 

 dren of whom III, 19, was a hterary composer; III, 18, had good musical abihty; 

 III, 20, was brilliant piano player with a fine baritone voice and hterary; and 

 III, 17, both hterary and musical, married a man with inventive abihty whose 

 first cousin, III, 9, was an organist and musical composer of high rank. Two 

 of their children, IV, 14, 15, show hterary abihty and IV, 14, inventive ability 

 also. He married into a family famous in American hterature and with much 

 musical ability and the product was two children both hterary and one, V, 7, an 

 inventor of high rank. Ill, 1 and 3, derived from a musical father, have hterary 

 ability of a high order. One who has also some musical ability married a very 

 musical wife and of the 4 sons at least 3 have musical abihty. One of 

 these, IV, 3, combined with the musical also literary ability, married a woman 

 with some literary ability and had 4 sons of whom 3 at least are littera- 

 teurs and two have much musical abihty. V, 5, is a well-known authoress. 



vous, quick, often elated or alternately elated and depressed. 

 Between the extremes lie, as is usually the case, many 

 intermediates. While it is clear that there are no sharp 

 lines to be drawn between these conditions, some insight 

 into their hereditary behavior may be gained by an exami- 

 nation of the opinions furnished by collaborators in the 

 Family Records. 



When phlegmatic is assumed to be a condition recessive to the "inter- 

 mediate" and nervous conditions we find that in three families with 13 

 offspring, 10 or 77 per cent, are likewise phlegmatic. On the other hand, 

 when nervous is assumed to be recessive to intermediate and phlegmatic 

 in 130 offspring of nervous parents 64 or 49 per cent were nervous. 



