METEOROLOGICAL SYNOPSIS. 



125 



MONTHLY RESULTS OF OBSERVATIONS, 



At 7 A. M., and at 2 and 9 p. m., for the year 1865, by C. Dewey. 



1. Thermometer, 



MONTHS. 



T S Firs 



Jan. < c- ■> 



( Sec' 



Feb. 

 March 

 April 

 May 



First half, 

 a half, 



First half, 

 Sec'd half, 



June 

 July ) 

 August < 

 Sept. ] 

 October J 

 Nov. \ 

 Dec 



• 1 



23. S2 

 18.04 



19.93 



28.62 



30.75 

 42.50 



47.35 

 48.43 



57.67 

 62.79 



68.36 

 71.80 



68.35 

 68.91 



70 76 

 65.21 



72.67 

 61.31 



51.69 

 42.18 



40.09 

 .39.46 



.34.20 

 28.10 



II. 



20.60 

 24.27 

 36.79 

 47.89 

 57.13 

 70.08 

 58.64 

 67.90 

 66.99 

 46.77 

 39.72 

 31.10 



III. 



34.33 

 vJ6.3.? 



36.67 

 42.00 



53 . 00 

 5*9.00 



63.. 33 

 60.33 



60.67 

 73.00 



78.00 

 81.33 



77.00 

 78.33 



82.00 

 77.67 



78.67 

 70.00 



63 . 00 

 52.00 



52.67 

 56.67 



53.67 

 41.33 



IV. 



V. 



VI. ! VII. 



VIII. 



14.00 

 7.00 



9.00 

 18.00 



12.00 

 33.33 



35.00 

 39.33 



42.00 

 50.33 



61.67 

 61.00 



58.67 

 57.67 



61.00 

 54.67 



65.67 

 54.67 



43.67 

 35.33 



27.67 

 29.00 



15.67 

 15.33 



97 

 43 



37 

 50 



63 

 75 



72 

 74 



70 

 86 



90 

 90 



84 

 85 



91 



88 



77 

 76 



69 

 54 



63 

 66 



61 



47 



4 

 4 



—2 



+2 



6 

 29 



30 

 33 



44 

 54 



57 



67 



54 

 56 



55 

 50 



63 

 42 



35 



28 



26 



26 



12 

 10 



37 

 48 

 69 

 64 

 42 

 33 

 31 

 36 

 35 

 41 

 40 

 51 



25.83 

 24.97 



24.00 

 27.24 



30.17 

 34.64 



41.19 

 47.00 



52.92 

 59.18 



63.31 

 69.08 



70.19 

 70.97 



70.14 

 67.16 



64.14 

 57.03 



51.31 



45.00 



41.18 

 35.01 



31.07 

 25.81 



IX. 



25.. 34 

 25.65 

 32.45 

 44.08 

 56.33 

 66.18 

 70.58 

 68.61 

 60.58 

 48.05 

 38.10 

 28.72 



Mean of year, 48.16: Range of year, 93.5. General average, 47.06. 

 Highest annual mean temperature 48.30 in 1853, and next 48.26 in 1846, and 48.16 in 

 1865; all above the general average. For twenty-eight years, sum 1315.81; 

 for 1865, 48.16; for twenty-nine years, 47.04, as above. 



for each half- 

 lowest mean of 



of each half; 

 temperature of 

 temperature of 



In this Table we have, Column I, average temperature 

 month, and, II, of each month; III and IV, highest and 

 «ach month; V and VI, highest and lowest temperature 

 VII, range of temperature in the month ; VIII, average 

 €ach half-month in twenty-nine years, and, IX, average 

 each month for the same years. 



From the numbers we deduce the mean temperature as 

 and its range of temperature, and then the general average 

 uine years, 47.00°. 



above of 1865 

 fur the twenty- 



