Life history album / prepared by direction of the Collective Investigation Committee of the British Medical Association ; edited by Francis Galton.

  • British Medical Association. Collective Investigation Committee.
Date:
1884
Catalogue details

Licence: Public Domain Mark

Credit: Life history album / prepared by direction of the Collective Investigation Committee of the British Medical Association ; edited by Francis Galton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    199/201 (page 172)
    rarely colour blind, the verdict of two ladies might be relied on. They should be asked to select a sample of distinctly green wool, and to request you to sort out of the rest of the heap, and to lay by the side of the sample, every bit of wool that has any tinge of green in it. The majority of the wools used for the test should be of delicate tints, and varieties of browns, pinks, reds, violets, yellows, greys, and greens. The trial should be made in good daylight, and it should be insisted upon that no clue nor guidance should be given to help you in your choice.