Volume 5

Treasury of human inheritance / edited by Karl Pearson, R.A. Fisher, L.S. Penrose.

Date:
1909-
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: Treasury of human inheritance / edited by Karl Pearson, R.A. Fisher, L.S. Penrose. Source: Wellcome Collection.

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    Additional information is also given of the descendants of III. 52; the two sons and two daughters of IV. 83 died unmarried; IY. 84 had a daughter who died, probably quite young. IV. 89 has four daughters and two sons, of whom one son is colour-blind and one daughter has transmitted the defect; thus V. 123 has one daughter, YI. 118, who was abroad, and two sons, YI. 119, who was tested and had normal colour vision, and YI. 121, who was abroad but was believed by his brother to have normal colour vision. Y. 124 has three sons and three daughters, of whom YI. 123, a medical man, writes that he is colour-blind (red- green), this is also confirmed by his uncle, Y. 130; he had one daughter, VII. 60. YI. 124, 125 and 126 were unmarried, YI. 127 was dead, and YI. 128 was unmarried and abroad. V. 126 had a son and daughter, of whom the son, VI. 130, was tested by Stilling’s Tafeln. Y. 128 had a son, VI. 131, who was tested and had no difficulty with colours. V. 130, aged 64 (1925), a chemist, is markedly colour-blind, and has to take great care in choosing clothes and ties; he cannot rely on his own choosing; in the spectroscope he named yellow and blue; with Stilling’s Tafeln he failed to read any figure on Tafeln 1 to 11, he read three on Tafel 12 and all on Tafel 13; with Holmgren’s wools he matched pale green with indefinite colours, i.e. straws and buffs; with orange he gave a bright red, with bright green he matched grey, and with red he picked up dark greens; with rose he put blues; with Nagel’s cards he was quite useless. Y. 131 is abroad. YI. 33 is married with no offspring; she was examined and found to have normal colour vision. YI. 34 is now dead; on one occasion he undertook to select a green rug to replace one of the same colour that was worn out; on returning home he was told that the new rug was not of the right colour; he replied that it was very stupid of the vendor to send the wrong one for he had chosen an exact match; he asked to see the rug, and on seeing it, at once said that it was all right: it was brown. This confusion of green and brown is what occurred when I. 5 wished to buy a new gown for his wife. Consanguinity. (See Bibl. No. 357, with additions.) Fig. 409. Nettleship’s Case. This very extensive pedigree was nearly completed at the time of Nettle- ship’s death after which the material was arranged for publication, and a few additions were made by IJsher. Thirty cases of colour-blindness are shown in the chart, two of which occur in women. Nothing appears to be known of the colour vision in members of generation I or in their ancestry. Of the children of I. 3 and 4, one son, II. 6, was known “definitely” to have been colour-blind; a daughter, II. 2, had a colour-blind great-grandson, Y. 1, but since nothing is known of the colour vision of III. 3 it cannot be said that the defect of Y. 1 arose through II. 2. Nothing is known of II. 3 and 4. II. 10 is believed by at least three of his daughters, to have had normal colour vision. II. 6 had one son, III. 5, and five daughters, all apparently free from the defect which, however, was transmitted by all the four daughters who married; thus III. 7, whose husband, III. 8, was in the Navy, had one daughter, IY. 8, with no defect, who married her first cousin and had four children, of whom one son, Y. 4, was rejected for the Navy on account of colour-blindness; III. 9 married her maternal first cousin and had three colour-blind sons, IY. 10—12, one normal son who married, IY. 8, and five,normal daughters, two of whom had children and one of whom had a colour-blind son, Y. 12; Y. 9 and 11 were captains in the Army; Y. 10 was in the Navy. III. 11 had eight children, of whom IY. 21 was a captain in the Navy and not colour-blind; IY. 22 and 23 were reported to be colour-blind; IY. 24 said that he was colour blind for reds and greens; IY. 26 was tested, he saw “blue and orange with green between” in the spectrum; called reds green and greens red, and made other errors with Edridge-Green’s lantern and also made characteristic mistakes with wools; he was myopic; IY. 28, 29 and 30 and the two daughters of IY. 30 were all reported to have normal colour vision. III. 13, the last married daughter of the colour-blind father, II. 6, had two colour-blind sons, IY. 32 and 33, and one presumably normal daughter, IV. 34. IV. 32 and 33 were both tested; each saw “blue and yellow” in the spectrum and made characteristic mistakes with wools and with Edridge-Green’s lantern; IY. 33 had myopia of more than 10 d. II. 10, believed to have normal colour vision, married II. 11, in whose family no colour-blind ness could be found, there were however few of this family living; they had ten children, of whom two and possibly three of the five sons were colour-blind, and one of the four married daughters transmitted the defect. Thus III. 19, female, had eight sons, five of whom were colour-blind; IV. 45 failed to pass the R.N. medical test owing to colour-blindness; IV. 46, 47 and 48 were reported by their brother to be colour-blind; IY. 49 was abroad, but wrote, “I am very colour-blind, but so also are several of my brothers; all the odd numbers of us were colour-blind”; he had once been tested and was unable to see poppies in a field of corn or geraniums against the grass of a lawn; some pinks he called Cambridge blue. III. 19 further had one married daughter, IY. 51, who transmitted the defect to one of her two sons, Y. 22, who painted a brown horse green. III. 25 sketched, but asked to be told which were his red and green paints; he married III. 26, whose father, II. 12, was reported to be colour-blind by one of his sons; the story current in his family tells how, when his wife joined him in the hills in India, she found him clothed in red trousers; he was a clergyman and presumably thought them to be black or grey; three of the family, however, had denied the existence of colour-blindness in the stock. Of the children of III. 25 and 26 two sons had normal colour vision, one of them was in the Navy, the other, IY. 71, was tested by Nettleship, he married IV. 103, a member of another colour-blind stock and had two sons, aged 3 and 2 years respectively; IV. 73, female, was tested by Nettleship and found to be colour-blind, she said she 30 B. T.