SEEIES D. — MONTHLY DEFLECTIONS. 



149 



SERIES D. — Continued. 



Average duration of winds, in each month, in the State of Pennsylvania, deduced from observations taken at forty 



different stations, for an aggregate period of forty-eight years and eleven months. 



Months. 





H 





m 





H 





H 





^ 





^ 





^^ 





^ 







t.-. « 











w 



f5 





DQ 



« 



to 





OQ 



^ 



to 







!s 



fe 



a 





o to 







&: 



IZi 



12; 



w 



H 



H 



m 



to 



to 



to 



to' 



.44 



^ 



^ 



fc 



fe 



o 





rt£ 



^■1 



January 



1.17 



.47 



2.53 



.28 



1.97 



.11 



2.73 



.17 



1.26 



.30 



4.49 



5.41 



.79 



5.97 



.27 



2.64 



N. 80° 52' W. 



28 



31 



February 



1.13 



.24 



1.94 



.17 



1.45 



.14 



2.02 



.06 



1.04 



.15 



4.31 



.53 



4.94 



..57 



6.42 



.31 



2 58 



N. 78 5 W. 



38 



28 



March 



1.72 



.49 



2.27 



.16 



1.85 



.11 



2.36 



.12 



1.62 



.32 



4.63 



.51 



5.45 



.61 



6.66 



.18 



2 95 



N. 82 58 W. 



30 



31 



April 



1.63 



.46 



2.56 



.18 



2.19 



.09 



3.04 



.23 



2.20 



.36 



4.29 



.35 



4.64 



.58 



5.01 



..34 



1,87 



S. 89 9 W. 



20 



30 



May 



1.16 



.28 



1.83 



.21 



1.34 



.19 



2.61 



.29 



1.96 



.54 



4.84 



.37 



4.97 



.70 



6.29 



..54 



2.88 



S. 88 45 W. 



33 



31 



June 



1.24 



.10 



1.61 



.11 



1.47 



.20 



2.45 



.13 



2.03 



.27 



4.88 



.45 



5.20 



.59 



5.18 



.30 



3.79 



S. 83 31 W. 



33 



30 



July 



1.21 



.19 



1.41 



.11 



1.46 



.11 



1.91 



.27 



2.0J 



.44 



6.12 



.54 



6.52 



.93 



4.89 



.22 



3.66 



S. 82 32 W. 



41 



31 



August 



1.13 



.22 



1.91 



.14 



2.18 



.36 



2.78 



.25 



2.59 



.18 



4.97 



.34 



5.42 



.63 



3.65 



.19 



4.16 



S. 64 10 W. 



26 



31 



September 



1.47 



.18 



1.43 



.16 



2.05 



.10 



1.98 



.34 



2.20 



.23 



3.84 



.33 



5.33 



.63 



5.45 



.37 



3,92 



N. 89 3 W. 



31 



30 



October 



1.39 



.12 



1.63 



.05 



1.58 



.16 



2.42 



.13 



1.78 



.37 



4.40 



.48 



6.00 



.55 



6.44 



.45 



3.16 



N. 88 24 W. 



37 



31 



November 



1.48 



.14 



1.66 



.18 



1.96 



.06 



1.84 



.09 



1.3( 



.19 



3.76 



.47 



6.84 



.74 



6.19 



.43 



2.79 



N. 79 3 W. 



39 



30 



December 



1.64 



.28 



2.03 .11 1.71 



.06 



1.89 



.10 



1.26 



.21 



4.36 



.77 



6.39 



.85 



6.60 



.24 



2.50 



N. 79 10 W. 



44 



31 



Total 



16.37 



3.16 . 



2.60 1.84 21.21 



.67 



28.03 



2.18 



21.25 



3.55 a 



3.89 5 



.58 



)7.11 



8.17 



67.65 



3.84 



36.90 



N. 88 15 W. 



32 



365 



No. 33.— Girard College, Philadelphia. 



No. 34. — Fort McHenry, near Baltimore. 



5 YEARS. 



5 YEARS. 





1 



. i 



Deflecting forces. 







ra 



Deflecting forces. 



Months. 



Mean direction of 

 Wind. 



-2 §■ 





Months. 



Mean direction of 

 Wind. 



II 

















m£ 



Direction. 



Am't. 







k£ 



Direction. 



Am't. 



January 



N. 49° 20' W. 



29^ 



N. 9° W. 



13 



January 



N. 31° 0' W. 



35 



N. 11*° W. 



22 



February 



N. 65 47 W. 



32* 



N. 52 W. 



12 



February 



N. 55 38 W. 



31 



N. 49 W. 



18 



March 



N. 64 28 W. 



20 



N. 30 E. 



3 



March 



N. 18 41 E. 



9 



N. 86 E. 



17 



April 



N. 6 55 E. 



8 



N. 85 E. 



21 



April 



N. 55 26 E. 



18* 



N. 87 E. 



27 



May 



S. 78 36 W. 



23 



S. 15 W. 



11 



May 



S. 18 32 W. 



18 



S. 17 E. 



25 



June 



S. 58 5 W. 



29 



s. m w. 



21 



June 



S. 71 57 W. 



15 



S. 3* W. 



13 



July 



S. 58 38 W. 



27 



S. 9 W. 



20 



July 



S. 55 8 W. 



41 



S. 34 W. 



38 



August 



S. 80 53 W. 



10 



S. 45 E. 



21 



August 



S. 59 22 W. 



13* 



S. 4 E. 



16 



September 



N. 42 10 W. 



16 



N. 56 E. 



11 



September 



S. 82 47 W. 



19 



S. 32 W. 



13 



October 



N. 71 50 W. 



31 



N. 65 W. 



10 



October 



N. 40 34 W. 



16* 



N. 15 E. 



5 



November 



N. 54 15 W. 



36 



N. 31 W. 



18 



November 



N. 21 46 W. 



26 



N. 9 B. 



17 



December 



N. 60 30 W. 



36 



N. 43 W. 



16 



December 



N. 41 17 W. 



45 



N. 32 W. 



30 



The year 



N. 74 5 W. 21 







The year 



N. 59 6 W. 



15* 







No. 35. — Average duration of winds in each month, in Delaware, Maryland, and Eastern Virginia, deduced from 



observations taken at fourteen different stations, for an aggregate period of 25J years. 



Months. 







s 











;■ 





^ 



to 



^ 



s 



^ 





a 



Mean direction 

 of Wind. 



aj S 



Deflecting forces. 



tw 









!2; 



15 



'^ 



n 



w 



.00 



to » 

 2.49 .( 



5 1.56 



to 

 .03 



to 

 4.69 



.01 



6^ ^ 



3.29 .0 



!5 

 8 8.8i 



.03 



tD 



.92 





rt5 



Direction. 



Am't. 



ll-l 



Jan. 



2.81 



.02 



4.73 



.0 



1.4f 



N. 47°47' W. 



27 



N. 20° W. 



18 



31.00 



Feb. 



1.78 



.00 



4.53 



.0 



J 1.36 



.02 



2.47 .' 



7 1.44 



.o; 



5.11 



.03 



2.46 .( 



7 7.9^ 



.0-1 



.90 



N. 56 32 W. 



21 



N. 15i W. 



12 



28.24 



March 



2.06 



.01 



4.65 



.0 



2.28 



.00 



4.13 .1 



1 2.19 



.01 



5.28 



.02 



2.92 .( 



6 7.1 r 



.05 



.21 



N. 64 25 W. 



12 



N. 15 K. 



6 



31.00 



April 



1.B6 



.00 



4.61 



.0 



2.75 



.00 



4.13 .1 



4 2.81 



.01 



5.14 



.00 



2.05 .( 



1 6.8 



.01 



.00 



N. 77 23 W. 



6 



N. 75 E. 



6 



30.00 



May 



1.15 



.04 



4.48 



.0 



2.32 



.no 



5.79 .( 



4 4.05 



.00 



5.61 



.00 



2.50 .( 



4.61 



.OS 



.39 



S. 1 29 W. 



14J 



S. 41 E. 



18 



31.00 



June 



1.10 



.00 



3.94 



.0 



2.3( 



.00 



4.65 .( 



1 3.42 



.02 



7.23 



.00 



2.58 .0 



4.39 



.00 



.35 



S. 26 26 W. 



IS 



S. 16 E. 



17 



30.00 



July 



1.05 



.01 



3.76 



.0 



1.02 



.00 



4.69 .0 



3.63 



.00 



9.37 



.00 



2.48 .0 



4.97 



.00 



.03 



S. 41 41 W. 



27 



S. 10 W. 



19 



31.00 



Aug. 



1.85 



.01 



4.87 



.fl 



1.61 



.00 



5.16 .0 



1 3.07 



.0(1 



7.31 



.00 



2.63 .0 



4.36 



.01 



.12 



S. 31 20 W. 



13 



S. 26 E. 



13 



31.00 



Sept. 



2.29 



.00 



5.90 



.0 



2.nn 



.00 



3.51 .( 



3.14 



.00 



6.07 



.00 



[.94 .0 



4.79 



.01 



.35 



S. 87 21 W. 



3 



S. 88 E. 



10 



30.00 



Oct. 



2.07 



.00 



5.50 



.0 



1.73 



.00 



3.46 .0 



2.65 



.00 



5.63 



.02 



2.55 .0 



7.39 



.00 



.00 



N. 55 33 W. 



12 



N. 21 E. 



6 



31.00 



Nov. 



1.90 



.00 



3.96 



.0' 



1.41 



.00 



2.59 .( 



1 2.32 



.00 



5.91 



.00 



3.01 .0 



) 8.50 



.04 



.29 



N. 70 58 W. 



25 



N. 51 W. 



12 



30.00 



Dec. 



2.17 



.00 



4.88 



.0( 



1.12 



.03 



2.55 .0 



5 2.16 



.00 



5.98 



.00 



2.58 .0 



9.40 



.08 



.00 



N. 86 57 W. 



23 



N. 85 W. 



10 



31.00 



