Ozone, and the Atmosphere. 



FIEST SEEIES OF COMPAEISONS. 



2l3 





DRY 



MOISTENED 



OZONOSCOPES. 



HALF AN HOUR. 



AT ONOE. 



ONE HOUR. 



TWO HOURS. 



KI 



Dark Yellow 



Brown 

 Lilac 

 Blue 

 Faint blue 



Light blue 



Brown 

 Strong blue 

 Dark blue 

 Dark blue 



(1) Very brown 



(3) Dark blue 



(2) BJack 



(4) Blackish blue 





Moffat 



Violet 







(not tried) 















Thallium 















(5) Blue 



SECOND SEEIES. 



THIED SEEIES. 





DRY 



MOISTENED | 



DRY 



MOISTENED 





5 MINUTES. 



15 MINUTES. 



AT ONCE. 



15 MINUTES. 



AT ONCE. 



KI 



Yellow 



tr. 



Lilac 



tr. 

 (not tried) 



Rrown (1) 



Yellow (5) 



" [*) 



(6) 



Violet (2; 



Brown (3) 



(1) 



(6) 

 (2) 

 (3) 

 (5) 

 (8) 



(T) 



(4) 



Dark brown (1) 



(9) 



Grey (5) 

 Greenish (7) 

 Lilac (6) 

 Faint lilac (8) 

 Blue ' (2) 

 Bed (3) 

 Brown (4) 



, (not tried; 



(1) 



(9) 

 (2) 

 (3) 

 (4) 

 (5) 

 (6) 



<1> 



(8) 





Moffat 















Lead Sulphide 









EOUETH SEEIES. 





DRY 



MOISTENED 



OZONOSCOPES. 



10 MINUTES. 



AT ONOE. 



HALF AN HOUR. 



KI 



Yellow (1) 



tr. (4) 

 tr. (5) 



Kedn'd (3) 

 Brown (2) 



Yellowish red (1) 

 Blue (6) 

 Bark blue (2) 

 Blue (3) 



tr. (7) 



Same as before (5) 

 ' W 



Same as before (1) 

 Darker blue (5) 

 Same (2) 

 Same (4) 





Moffat 







Blue (8) 







Same (8) 

 Same (6) 



Thallium 











Blue (7) 





