138 



MEAN METEOROLOGICAL RESULTS 



In the following summary several of the results of the year 1865 

 are compared with the averages derived from a series of years, as well 

 as with the extreme values of analogous results given by the same 

 series : 



TEMPERATURE. 



1865. 



of 

 25 years. 



Extremes, 



Mean temperature of the year , 



Warmest month , 



Mean temperature of the warmest month , 



Coldest month 



Mean temperature of the coldest month 



Differeiioe between the temperatures of the j 



warmest and the coldest month ) 



Mean of deviations of monthy means from") 



their respective averages of 25 years, signs > 



of deviation being disregarded J 



Months of greatest deviation, withont re- ? 



gard to sign i 



Corresponding magnitude of deviation 



Warmest day 



Mean temperature of the warmest day 



Coldest day 



Mean temperature of the coldest day 



Date of the highest temperature , 



Highest temperature 



Date of the lowest temperature 



Lowest temperature 



Range of the year 



44.92 

 August. 



65.18 

 January. 



17.75 



47.43 

 2.51 



Septem'er 



6.7 

 Aug. 3. 

 76.67 



Jan. 17. 



1.77 

 Sept. 14. 



90.5 



Feb. 13. 



—10.0 



105.5 



-44.17 

 July. 

 66.98 

 February 

 22.99 



43.99 



2.33 



January. 

 3.7 



77.45 



—1.02 

 90.6 



—12.4 

 103.0 



46.36 in '46. 

 July, 1854. 



72.47 

 Jan. 1857. 



12.75 



3.68 in 1857. 



Jan. 1857. 



10.8 

 July 12, '45. 



82.32 



42.16 in '56. 

 Aug. 1860. 



64.46 

 Feb. 1848. 



26.60 



l.S6in'e4. 



July 31, '44. 



72.75 



f Feb. 6, '55 \ p,„„ „„ ,,„ 

 I Jan. 22; -57 ^°^<'- 22. 42. 

 9.. 57 



-14.38 

 Aug. 24, '54. 



99.2 

 Jan. 26, '59. 

 —26.5 

 118.2 



Aug. 19, '40. 



82.4 



Jan. 2, '42. 



1.9 



87.0 



BAROMETER. 



1865. 



Average 



of 

 18 years. 



Extremes. 



Mean pressure of the year 



Month of highest mean prossure 

 Highest mean monthly pressure 

 Month of lowest mean pressure 

 Lowest mean monthly pressure 



Date of highest pressure in the year < 



Highest pressure 



Date of lowest pressure in the year \ 



Lowest pressure 



Eange of the year 



26.6330 



Septem'er 

 29.7180 

 March. 

 29.5277 



Nov. 10. 1 

 9 p.m. J 



30.354 

 March 22, 



11 a.m. 



28.707 



1.647 



29.6133 

 Septem'er 

 29.6629 

 June. 

 29.5624 



Average 

 of 



25 years. 



28.(581 

 1.6S3 



(29.6679 in 

 1 1849. 

 Jan. 1849. 



29.8030 

 March, 1859. 



29.4125 



J Jan. 8. 

 I 1855. 



30.. 552 

 f March 19, 

 1 1859. 



28.2S6 

 5 2.106 

 I in 1859. 



29.5596 in 



1864. 

 June, 1864. 



•29 6545 

 Nov. 1849. 



29.5868 



October 22 

 1845. 

 30.242 



March 17, 



1845. 



28.939 



1.303 



in 1845. 



