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Transactions of the Kansas 



observations taken at typical stations in tliat State. A comparison of these records 

 results, as already stated, very favorably to the atmosphere of Kansas, both in the 

 amount of ozone present, but especially in the high averages of the spring and 

 summer months. These changes in the quantity of atmospheric ozone, during the 

 different seasons of the year, nowhere appear so strikingly as when presented in 

 diagrams. For the purpose of exhibiting these changes, I have constructed a dia- 

 gram for four of the Kansas stations, in which, by a broken dotted line for the 

 " Day observations," and a dark line for the " Night observations," the variations 

 in amount of ozone in our atmosphere are vividly shown for each month through- 

 out the year. 



These diagrams show finely the general characteristics of ozone records, viz : 

 the superiority of the night observations over those for the day, except during the 

 warm summer months, when the condition is usually reversed ; and the gradual 

 fall of the quantities registered, from a high mean during the winter months to a 

 comparatively low condition during summer, followed by a rise again with the ap- 

 proach of the succeeding winter. But the important feature already mentioned in 

 the relatively large quantity of ozone indicated by some of our stations during the 

 spring and summer months, is shown with especial prominence on comparing these 

 diagrams with the records of Eastern stations. Each of these diagrams will well 

 repay individual attention and study. The observations at Lawrence under the 

 charge of Mr. Long, are chiefly remarkable for the fact that the night records main- 

 tain their superiority over those of the day only to the month of May, when they at 

 once drop below the day results, and remain below them throughout the year, with 

 the exception of a slight rise during the latter part of July and the first of August. 

 The night records attain their highest mean, 4.77, during March, and their lowest, 



1877 ELLINWOOD 1876 



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