071 Ozone, 



137 



.COMPABATIVE TABLE OF MEAN AMOUNT OF OZONE AT 

 DIFFERENT STATIONS. 



MONTHS. 



MELBOURNE. 



BALIjARAT. 



SANDHURST. 



BEECHWORTH. 



Day. 



Night. 



Day. 



Night. 



Day. 



Night. 



Day. 



Night. 



1858. 



March 



April 



May 



June 



July 



August 



September 



October 



November 



December 



1859. 



January 



February 



3-32 



3-90 

 3-98 

 2-62 

 4-17 

 3-48 

 3-00 

 2-44 

 3-00 

 2-60 



2-78 

 2-27 



4-17 

 417 

 3-75 

 3-71 

 4-56 

 3-95 

 4-27 

 3-62 

 411 

 316 



318 

 3-32 



5"i 



6-0 

 6-8 

 5-3 

 3-7 

 3-8 

 3-2 



3-4 



3-8 



5-7 

 7-7 

 71 

 7-0 

 5-4 

 61 

 4-7 



51 

 5-3 



11 

 2-4 

 5-2 

 6-9 

 7-3 

 5-7 

 5-3 

 2-0 

 2-7 

 2-3 



2-0 



21 

 4-2 

 7-3 

 7-9 

 9-0 

 7-5 

 7-5 

 5-0 

 5-9 

 4-9 



3-7 



2-2 

 3-2 

 5-8 

 5-9 

 5-7 

 5-9 

 6-5 

 3-8 

 2-9 

 2-9 



4-0 



ro 



4-4 

 6-2 



7-7 

 7-7 

 7-6 

 7-2 

 8-0 

 5-0 

 4-8 

 4-5 



5-0 

 4-0 



Means . . 



312 



3-83 



- 



— 



- 



— 



417 



5-95 



For Melbourne it was found that the ozonic reaction is 

 smaller with east winds, slightly increases with N. and 

 N.W. winds, and reaches its maximum when the wind blows 

 from S. W. towards the east, gradually decreasing again. 



With regard to the seasons, and day and night, the 

 amount of ozone shows, with Schoenbein's test paper — 



OZONIC 



QUARTEE. 



Spring ... 

 Summer 

 Autumn 

 Winter ... 



Year 



3 REACTION 





DAT. NIGHT. 



2-81 4-00 

 2-55 3-22 

 3-73 4-03 



MEAN 



3-40 



2-88 

 3-88 



3-55 

 316 



419 



3-87 

 3-51 



There seems also a distinct variation throughout the day 

 in the amount of ozone, in addition to that already shown 

 by the day and night registrations. 



Papers exposed during six hours give — 



Between 6 a.m. and noon 

 „ noon and 6 p.m. 

 ,, 6 p.m. and midnight ... 

 ,, midnight and 6 a.m. ... 



1-59 

 1-63 

 1-58 

 1-70 



It appears that between the hours of 6 and 9 p.m. the 

 amount is least, between 6 and 9 a.m. greatest. 



