SERIES B. ZONE 11. LAT. 35° TO 40° N. 



425 



(Nos. 133 to 138.) 



District of Columbia and Southern Maryland.- 



—Continued. 









Eelative Prevalence of Wihds feom the 





^J Monsoon 









Different Points of the Oompass. 







influenc 



=s. 



>i 



1 "^ 





H 





M 



^ 









Place and 



Time of the 



S^ 





ijj 





.gjj 



i>*j 



. 



Direction of 



So 







<M 



kind of 

 observations. 



year. 





0^ 





t.aj 





oW 





s^ 



cl 



resultant. 



o§ 



Direction. 





OJ 







A 









.a 



















^ 







V, 



Wg 



■» 



Wo 



"5 



^ S 



CO 



^s 



E S 





'C 









a 







o 



^B 



» 



to .2 



m 



ai£ 



$ 



^B 









tf*' 





& 



3 



133. 































U.S. Naval 

 Observat'y. 



The year 



263 



432 



189 



203 



327 



562 



384 



703 



528 



N. 81°52'W. 



.15 







1461 







January 



15 



46 



3 



31 



19 



49 



14 



71 





N. 66 24 W. 



.20 











February 



11 



44 



4 



25 



19 



49 



6 



68 





N. 51 14 W. 



.20 









• 



March 



9 



48 



7 



36 



29 



27 



4 



88 





N. 30 54 W. 



.15 











April 



19 



32 



7 



24 



29 



43 



4 



79 





N. 64 12 W. 



.20 











May 



12 



26 



11 



43 



47 



47 



4 



58 





S. 25 12 W. 



.17 









134. 



.June 



16 



30 



10 



33 



30 



63 



7 



51 





S. 53 20 W. 



.17 









Washing- ■ 



July 



12 



27 



3 



33 



36 



73 



2 



62 





S. 55 18 W. 



.25^ 









ton, D. C. 



August 



18 



43 



6 



37 



33 



58 



2 



51 





S. 45 42 W. 



.09 











September 



18 



55 



10 



26 



33 



34 



5 



60 





N. 11 16 W. 



.lOi 











October 



12 



40 



6 



21 



39 



43 



12 



74 





N. 88 6 W. 



.16 











November 



10 



34 



2 



14 



32 



53 



7 



88 





N. 76 34 W. 



.30 











December 



9 



35 



3 



21 



35 



56 



4 



85 





N. 85 52 W. 



.25 











The year2 





















N. 85 12 W. 



.17 











Spring 



149 



124 



"37 



273 



254 



179 



148 



355 





S. 67 32 W. 



.15 









.35. 



Summer 



120 



112 



71 



250 



301 



156 



138 



241 





S. 22 47 W. 



.17 









Fort 



Autumn 



113 



88 



31 



195 



161 



108 



105 



338 





N. 78 22 W. 



.17 









Severn. 



Winter 

 The year2 



88 



88 



16 



.128 



156 



133 



123 



398 





N. 74 33 W. 

 S. 81 24 W. 



.30 

 .17 







2709 





January 



"43 



25 



'"7 



"22 



"28 



"42 



"25 



"90 















February 



16 



16 



10 



25 



51 



61 



20 



64 

















March 



23 



34 



6 



25 



44 



53 



40 



66 

















April 



29 



36 



9 



28 



56 



38 



20 



65 

















May 



19 



22 



14 



44 



71 



56 



19 



43 

















June 



21 



15 



17 



45 



63 



54 



30 



39 















136. 

 Fort 

 Washing- ' 

 ton. 



July 



31 



36 



8 



41 



71 



39 



16 



50 















August 



31 



28 



7 



41 



59 



54 



27 



41 















September 



42 



62 



9 



60 



58 



55 



17 



80 















October 



33 



40 



3 



34 



41 



56 



23 



56 















November 



23 



31 



6 



23 



24 



57 



32 



94 

















December 



35 



19 



6 



28 



26 



64 



21 



103 

















Spring 



71 



92 



29 



97 



171 



147 



79 



174 





S. 59 29 W. 



.19 











Summer 



83 



79 



32 



127 



193 



147 



73 



130 





S. 26 57 W. 



.20 











Autumn 



98 



133 



18 



117 



123 



168 



72 



230 





N. 79 14 W. 



.17 











Winter 



94 



60 



23 



75 



105 



167 



66 



257 





N. 80 21 W. .29^ 











The year^ 





















S. 74 9 W. 



.19 







1613 



!a„_ 



^ tn 



Spring 



"73 



190 



"40 



233 



147 



233 



io8 



427 





N. 82 5 W. 



.154 



N."68°E. 



.05 







° o 



Summer 



59 



235 



50 



173 



125 



399 



120 



217 





S. 55 12 W. 



.184 



S. 23 E. 



.12 





o - 



o "^ ■ 



Autumn 



109 



187 



41 



83 



112 



301 



108 



209 





N. 88 40 W. 



.190 



N. 70 E. 



.01 





2=a 





Winter 



81 



143 



32 



93 



110 



247 



152 



405 





N. 74 5 W. 



.315 



N. 49 W. 



.13 





gP 



a ^ 



The year^ 





















N. 89 29 W. 



.199 









cc _ 





Spring 



604 



1306 



216 



1399 



1060 



1495 



1144 



6004 





N. 58 18 W. 



.361 



N. 59 W. 



.06 





« IP 



<" ^ 



Summer 



281 



1306 



234 



747 



647 



1956 



826 



1497 





3. 79 26 W. 



.206 



S. 22iE. 



.19 





■f^- 



. .2 . 



Autumn 



770 



1499 



175 



459 



682 



1706 



745 



1722 





N. 62 35 W. 



.215 



S. 65 E. 



.09 





a o 



§, 5 



Winter 



521 



1119 



155 



476 



556 



1054 



1288 



5262 





N. 52 47 W. 



.497 



N. 37 W. 



.20 





&S 



. 



The year2 





















N. 61 4 W. 



.328 









v< ^ 



■-■i 



Spring 



8.27 



6.87 



5.44 



6.00 



7.21 



6.42 



10.59 



14.06 















3 9 



% p* 



Summer 



4.76 



5.56 



4.684.32 



5.18 



4.90 



6.88 



6.90 















cc .2 



"■ s ■ 



Autumn 



7.06 



8.02 



4.275.53 



6.09 



5.67 



6.90 



8.24 

















a .2 



Winter 



6.43 



7.83 



4.84:5.12 



5.05 



4.27 



8.47 



12.99 















' From this table we obtain the following summary of results : — 1 





Sprln:; 



Summer. 



Autumn, ! Winter. 



The 



y^ear. 



."iverage velocity of all winds in miles per hour 



9.12 



5.44 



6.75 1 8.26 



7. 



39 



Velocity in mean direction on the supposition that the winds 













from every point of the compass move with the foregoing 













average velocity 



1.40 



1.00 



1.28 



2.60 



1.47 



True velocity iu mean direction, giving to the winds from the 













several points of the compass each their own average velocity 











as shown in the table above ....... 



3.29 



1.12 



1.45 ] 4.11 



2.42 



Excess of the latter over the former 



4-1.89 



+.12 



+ .17 +1.51 



+.95 



2 Computed from the resultants for the seasons. ' 1 



54 April, 1875. 



