MADE AT MARIETTA, OHIO. 



35 



The prevailing winds in each, season are as follows : In spring, N. ; in summer, 

 N. or S. W. ; in autumn, N. or S. W. ; in winter, S. W. winds. 

 The N. E. wind is least frequent in all seasons. 



Annual Fluctuation in the Resulting Direction of the Wind. 



R 



From Table VI we derive the following results for direction and value of — for 



n 



each month, season, and for the year. For comparison the corresponding values as 



found for Brunswick, Me., are added. 



72 

 Table VI. — Mean Monthly Direction and Value of — of the Wind at Marietta and 



n 

 Brunswick. 



Montli and Season. 



Marietta, Ohio. 



Brunswick, Maine. 1 



4 



R 



n 



~^— 69° 



4" 



n 



4.'— 102° 



January . 

 February . 

 March. 

 April 

 May . 

 June 

 July 

 August 

 September 

 October 

 November . 

 December . 









75° 

 90 

 93 

 91 

 61 

 51 

 54 

 24 

 42 

 69 

 68 

 76 



0.294 

 0.301 

 0.264 

 0.181 

 0.203 

 0.313 

 0.213 

 0.119 

 0.128 

 0.170 

 0.341 

 0.295 



+ 6° 

 +21 

 +24 

 +22 



— 8 

 —18 

 —15 

 —45 

 —27 



— 



— 1 

 + 7 



141° 



131 



116 



101 



62 



66 



66 



68 



84 



101 



131 



140 



0.406 

 0.403 

 0.344 

 0.263 

 0.222 

 0.346 

 0.462 

 0.426 

 0.381 

 0.349 

 0.404 

 0.421 



+39° 

 + 29 

 +14 



— 1 

 —40 

 —36 

 —36 

 —34 

 —18 



— 1 

 +29 

 +38 



Spring 

 Summer . 

 Autumn . 

 Winter 









82 

 47 

 63 

 80 



0.244 

 0.210 

 0.208 

 0.288 



+13 

 —22 

 — 6 

 +11 



97 



67 



106 



138 



0.257 

 0.411 

 0.356 

 0.413 



— 5 

 —35 

 + 4 

 +36 



Year 



69 



0.225 





102 



0.320 





Annual range at Marietta 69°, at Brunswick 75°. The extremes are reached 

 in February and August, or near the epochs of greatest cold and heat. 



Table VII contains the resulting direction of the wind for each year of observa- 



/? 



tion ; also the value — or the average length of the resultant. 



Table VII. 



Year. 



^ 



R 



n 



Year. 



^^■ 



R 



n 



Year. 



4. 



R 



n 



1829 

 30 

 31 

 32 

 33 

 34 

 35 

 36 



1837 



94° 

 88 

 76 

 75 

 91 

 94 

 73 

 84 

 85 



0.236 

 0.289 

 0.434 

 0.320 

 0.260 

 0.228 

 0.361 

 0.154 

 0.262 



1838 

 39 

 40 

 41 

 42 

 43 

 44 

 45 



1846 



103° 

 57 

 63 

 91 

 60 

 60 

 52 

 65 

 44 



0.152 

 0.201 

 0.305 

 0.221 

 0.254 

 0.243 

 0.241 

 0.422 

 0.218 



1847 

 48 

 49 

 50 



27° 

 33 

 45 

 50 

 32 

 81 

 73 

 73 

 54 



0.185 

 0.138 

 0.141 

 0.182 

 0.240 

 0.067 

 0.229 

 0.209 

 0.137 



52 

 53 



54 



58 

 1859 



