8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



that given by Colange's results, a difference which Hes within the 

 Hmits of error of the present work. With a larger number of sets of 

 observations than the lo of the present work, and particularly at high 

 ozone values, the accuracy of the determination could, of course, be 

 greatly increased. 



5 



rrrm 0, 

 Fig. 4. — Character of the results of the absorption of ozone. 



An area such as that illustrated in Figure 3, and pertaining to atmos- 

 pheric ozone only, can be obtained from atmospheric transmission 

 coefficients, if combined with the knowledge that there is no important 

 atmospheric absorption except ozone across this spectral region. That 

 atmospheric transmission coefficients show unmistakably the ozone 

 absorption has been pointed out and used by Fowle and others.' 



^ Fowie, F. E., Smithsonian Misc. Coll., vol. 81, no. 11, pp. 1-27, 1929. Caban- 

 nes, J., and Dufay, J., Journ. Phys. et le Rad., ser. 6, vol. 7, p. 257, 1926. 



