NO. 9 



DETERMINATION OF OZONE WULF 



The points shown on the holograms were chosen as far as possible 

 with respect to the known position of the ozone bands. These bands 

 are shown in Plate 3 as they were obtained in the work described in 

 footnote 2h, on page 2. The attempt was made to find points on 



rOOO 



5000 bOOO 7000 8i 



Fig. 2. — Diagrammatic example of ozone area. 



sm 



the solar hologram suitable for measurement which lay in every ozone 

 absorption maximum and minimum. 



From the above considerations, if a plot of the logarithm of the 

 ratio of ordinates is made against wave length, the type of result to 

 be expected is something of the form shown in Figure 2. The failure 

 to make accurate correction for changes in atmospheric transparency 

 or sensitiveness of apparatus will result in the points outside of ozone 



