286 On the Mean Temperature of the 



The thermometer stood seven months above, and five below, 

 the freezing point. 



The mean temperature of winter, that is Dec. Jan. Feb. = 2°.52. 



spring, — March, April, May, = 40 .77. 

 summer, — June, July, Aug. = 65 .30. 

 autumn, — Sept. Oct. Nov. = 36 .50. 



Farther, 



The temperature of the hottest month, . = 67°.55 

 coldest month, . = 2 .87 



Professor Bronner, during his residence at Kasan, in the 

 years 181 4- to 1817, has likemse made thermometrical observa- 

 tions, the results of which are calculated by Professor Fr. Par- 

 rot in Dorpat, and published in " Erdmann''s Contributions to- 

 wards the Knowledge of the Interior of Russia," Part I. It is 

 a pity that Professor Parrot has continued, in his calculation, 

 the divisions of the Julian Calendar, which is still u?ed in Rus- 

 sia ; so that the mean temperature of the individual months are 

 not comparable with the means calculated for other places ; but 

 this has, of course, no influence on the mean temperature of the 

 year. 



The observations were at 7 a. m., 12 noon, and sometimes 8, 

 sometimes 9 p. m., and gave the following results : 



If we add to this the result of 1828, we obtain 37°.4 as the 

 true mean temperature of Kasan, about 120 feet above the level 

 of the sea. 



I put also the mean temperature of April and October into 

 the quoted years. As Professor Parrot has calculated the mean 

 for the Julian months, I first, taking the observations of 1828 

 as a basis, inquired, whether the mean of the Julian ^arch and 

 April, did not approximate to the mean of the Gregorian April, 

 and the mean of the Julian September and October to the mean 



