EXPLANATION OF FIGURE 1 



Upper Section: ABSORPTION 



Water, ultraviolet, visible, and infrared. 



Ordinates: Absorption coefficients k in I = Ioe"kx (outside left). 



Thickness transmitting half intensity in cm. (inside 

 left) 



Transmission of 1-cm, thickness (right). 



Abscissae: Wavelengths in microns (bottom). — 



Wave numbers, waves per cm .(top) . 



Lower Section: RADIATION 



Relative emission from body at 1, 000° K. (dull-red therapeutic lamp). 



Relative emission from body at 3, 000° K. (high -temperature 

 tungsten lamp) . 



Relative emission from sun. 



