HEIGHT IN THE ATMOSPHERE, AT DIFFERENT SEASONS IN THE YEAR. 



495 



repeat, however, that the observation of these extremes is less hkely to be inva- 

 riably correct than any other part of the tables. Dividing the year into four 

 seasons, the following summary, which includes both morning and evening obser- 

 vations, is, from the extent of the induction, entitled to considerable confidence. 





Mean 

 Difference. 



Times out of 100 



negative. 



Mean of greatest 



+ values in each 



Montli. 



Mean of greatest 



— values in each 



Month. 



Spring ) 

 (March, April, May) J 



Summer ) 

 (June, July, August) j 



Autumn 1 

 (Sept., Oct., Nov.) J 



Winter "I 

 (Dec, Jan., Feb. j 



4°.30 

 3°. 58 



2°.72 

 2°. 30 



7.1 per cent. 

 13.5 

 15.0 

 15.6 



10°.5 



10° .3 



9°.8 



9°.8 



2°.87 

 4°.8 



7°.4 

 5°.9 



These numbers have been obtained from the following Table, which contains 

 the details. 



Table III. 







8 A. 



M. 







8p 



M. 









8 A 



M. 







8p 



. M, 





c 

 "S 



> 



% 



o 



o 

 6 



la 



4> 



1 



S3 



15.5 



3 



•3 



+ 



g 



3 



CO 



O 



1 



a; 

 « 



O 



o 

 o 

 15 



a 



11 



6" 



la .2 



_3 

 > 

 + 



5 



■3 

 >' 



1 



m 



i 



la 



o 

 1 



> 



1 

 |§ 



3 

 + 



O 



i 



« 



cs 



s 



a 



(3 



1 



O 



O 



1 



1 

 §§ 



<1J 



+ 

 1 



i 



> 



1 



1 



Jan. 1832 



31 



1 



16 



— 1 



31 



4 



13 



— 2 



July 1831 



31 



7 



9 



— 2 



30 



5 



10 



— 3 



... 1833 



31 



9 



4 



- 7 



31 



5 



5 



— 7 



... 1832 



31 



2 



12 



— 2 



31 



5 



10 



— 3 



... 1834 



31 



7 



13 



— 9 



31 



12 



10 



- 7 



... 1833 



31 



3 



8 



— 5 



31 



4 



8 



— 3 



... 1835 



31 



2 



10 



— 7 



31 



3 



16 



— 5 



... 1834 



31 



2 



6 



- 4 



31 



5 



9 



—12 





















1 ... 1835 



31 



11 



13 



— 5 



31 



8 



11 



— 8 



Feb. 1831 



28 



4 



8 



-7 



28 



5 



9 



— 8 



1 



Aug. 1831 

 ... 1832 



31 



5 



10 



— 2 



31 



1 



10 



— 3 



... 1832 



29 



3 



9 



— 7 



29 



9 



7 



— 4 



31 



6 



7 



— 4 



31 



6 



6 



— 8 



... 1833 



28 



2 



8 



— 1 



28 



3 



12 



— 4 



i ... 1833 



31 



1 



10 



— 2 



31 



2 



11 



— 3 



... 1834 



28 



8 



5 



— 6 



28 



. 7 



15 



-7 



... 1834 



31 



2 



17 



— 6 



-31 



2 



15 



— 5 



... 1835 



28 



2 



12 



—10 



28 



2 



12 



— 6 



... 1835 



31 



9 



10 



— 6 



"31 



5 



12 



— 5 



Mar. 1831 



31 



1 



14 



— 2 



31 



1 



14 



— 2 



Sept. 1831 



30 



3 



9 



— 4 



30 



1 



8 



— 2 



... 1832 



31 



1 



10 



— 1 



31 



2 



8 



— 6 



... 1832 



30 



4 



12 



—13 



30 



4 



18 



— 5 



... 1833 



31 



1 



7 



— 1 



31 



1 



6 



— 2 



i ... 1833 



30 



2 



15 



— 2 



30 



1 



11 



— 2 



... 1834 



31 



3 



12 



— 6 



31 



2 



17 



— 7 



... 1834 



30 



5 



6 



— 6 



30 



6 



9 



— 8 



... 1835 



31 



7 



6 



— 5 



31 



6 



7 



— 2 



... 1835 



30 



11 



7 



— 7 



30 



9 



11 



— 6 



Apr. 1831 



30 



2 



8 



— 2 



30 



2 



6 



— 3 



1 



j Oct. 1831 



31 







7 





31 



2 



4 



— 6 



... 1832 



30 



3 



9 



— 2 



30 



3 



13 



— 3 



: ... 1832 



31 



2 



15 



— 5 



31 



3 



13 



— 2 



... 1833 



30 



3 



7 



— 1 



30 







9 







j ... 1833 



31 



5 



10 



— 4 



31 



5 



12 



- 7 



... 1834 



30 







14 



— 



30 







15 







1 ... 1834 



31 



4 



14 



— 7 



31 



5 



17 



— 7 



... 1835 



30 



2 



13 



— 3 



30 



2 



17 



— 2 



... 1835 



31 



3 



5 



—10 



31 



4 



10 



— 7 



May 1831 



31 



2 



10 



— 2 



31 



3 



9 



— 1 



Nov. 1831 



30 



2 



7 



— 8 



30 



5 



7 



— 9 



... 1832 



31 



1 



9 



— 3 



1 31 



1 



11 



— 3 



j ... 1832 



30 



5 



5 



—10 



30 



5 



5 



—10 



... 1833 



31 



3 



11 



— 2 



31 



4 



12 



— 9 



... 1833 



30 



7 



9 



—19 



30 



8 



12 



—20 



... 1834 



1 











... 







... 1834 



30 



10 



8 



- 7 



30 



5 



12 



— 6 



... 1835 



31 



3 



10 



— 5 



31 



"i 



i'o 



— 4 





















June 1831 



30 







10 







30 



5 



11 



— 3 



j Dec. 1831 



31 



2 



7 



— 8 



31 



5 



7 



— 9 



... 1832 



30 



3 



11 



— 8 



! 30 



4 



17 



— 2 



... 1832 



31 



1 



11 



— 3 



31 



1 



10 



— 1 



... 1833 



30 



2 



9 



— 4 



: 30 



1 



8 



— 1 



... 1833 



31 



1 



7 



— 3 



30 



5 



9 



— 7 



... 1834 



30 



3 



6 



— 4 



30 



6 



10 



-12 



... 1834 



31 



9 



6 



—13 



31 



10 



13 



— 5 



... 1835 



30 



4 



9 



—10 



30 



6 



15 



— 9 



1 



















