Published online by Cambridge University Press: 15 May 2009
Dufton And Bedford (1933) have denied the claim made by me (1932) that bright sources antagonise the “nose-closing” rays given off by dull red and dark sources of heat. They are supported by Winslow, Greenburg and Herring-ton (1934). These five authors have used the same method, viz. the insertion of a well-fitting tube in one nostril of the subject, the connection of this tube with a recording instrument, and the leaving open the other nostril for breathing, the mouth being kept shut.