424 



WINDS OF THE GLOBE. 



(No. 132.) 



Southern Pennsylvania and Northern Maryland 















Relative Pkevalence of Winds from thk 













Different Points of the Compass. 





Is 



influences. 





«■ 





H 





*4 





.i 









[Kind of 



Time of 





¥.« 





lii 





.0^ 





S'*! 



» 



Direction of 



S 







observations. 



the year. 





'f'^ 





uin 





goo 





0% 



^3 



resultant. 



nE 



Direction. 









J3 



W» 



m 



Wo 



3 



il 



■s 



^% 



Sf 









? 







'^ 



^t 



W 



mt 



iC 



mt 



^ 



^l 









K 



b 



a - 



■0 ° 



Spring 



201 



234 



52 



172 



313 



619 



695 



650 





S. 87°53'W. 



.402 



N. 60° W. .01 



sS 



Summer 



•KYI 



244 



104 



192 



337 



797 



725 373 





S. 70 45 W. 



.371 



S. 21 E. ! .11 







Autumn 



186 



2tf(i 



95 



163 



254 



564 



8061 495 





S. 87 49 W. 



365 



N. 67 E. 



.03 





6t 



Winter 



199 



307 



79 



123 



211 



582 



905 737 





N. 81 6 W. 



.435 



N. 24 W. 



.10 



as^ 



z. 2 



The year^ 















1 





S. 87 30 W. 



.440 











Spring 



920 



870 



is2 



781 



1705 



2935 



3506'6253 





N. 79 22 W. 



.483 



N. 32 W. 



.07 



C4 rt rH 



"- m 



Summer 



692 



999 



3(i8 



816 



1550 



3780 



2629|1769 





S. 66 19 W. 



389 



S. 23 E. 



,23 



I'^l 



. — ■ 



Autumn 



771 



1295 



304 



882 



1270 



2810 



3484 4271 





N. 82 55 W. 



, 396 



N. 64 E. 



.(14 





^s 



Winter 



715 



115() 



373 



597 



835 



2655'5196 6529 





N. 73 21 W. 



..542 



N. 34 W. 



.16 





The years 



















N. 83 51 W. 



.444 







<2 "" "^ 



n\\ 



Spring 



4.58 



3.72 



3.60 



4.54 



5.45 



4.745.0419.62 













l§ 



Summer 



3.43 



4.09 



3.54 



4.25 



4.60 



4.75;3.634.74 

















Autumn 



4.15 



4.87 



3.20 



5.41 



5.00 



4.98'4.328.63 













CO QQ 



Winter 



3.59 



3.77 



4.72 



4.85 



3.96 



4.565.74'8.86 













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





Spring. 



Summer. 



Autumn. 



Winter. JTlie year.j 



Average veJocity of all winds in miles per hour 



5.84 



4.24 



6.33 



5.74 



5.29 



.Velocity in mean direction, on tlie supposition that the winds 













from every point of the compass move with the foregoing 













average velocity . 



2.35 



1.57 



1.95 



2.50 



2.33 



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













several points of the compass each their own average velocity, 













as shown in the table above 



2.82 



1.G5 



2.11 



3.11 



2.36 



Excess of the latter over the former 



+■47 



+ .08 



+ .16 



+ .61 



+.02 



s Computed from the resultants for the seasons. 



(Nos. 133 to 138.) 

 Observed as follows :- 



District of Columbia and Southern Maryland. 







Aggregate 





Place of observation. 



By whom observed. 



length of 

 time. 



Date. 



Agricultural College, Md., 



Montgomery Johns, M.D., 



T 



mos. 



2 



1861, 1862 and 1863. 



Annapolis, Md. 



A. Zumbrock & W. R. Goodman, 



12 



3 



1855 tol809 inclusive, exceptl860. 



Bladeusburg, Md., 



Benjamin 0. Lowndes, 



9 







1854 to 1865 inclusive, except 1859. 



Fort Severn, Md., 



Post Surgeon, 



7 



6 



1822, 1831 to 1834 and 1843 to 

 1845, all inclusive. 



Fort Washington, D. C, 



Post Surgeon, 



4 



5 



1833, 1834, 1851, 1852 and 1853. 



Georgetown, D. C, 



Rev. C. B. McKee, 







1 



1859. 



Isthmus, Md., 



Mr. Banning, 







11 



1843, 1844 and 1845. 



Leonardtown, Md., 



Dr. Alex. McWilliams, 







11 



1858 and 1859. 



Naval Observatory, D. C, 



Superintendent, 



4 







July, 1838, to June, 1842, inclusive. 



Nottingham, Md., 



A. P. Dalrymple, 







2 



1849. 



Ridge, 



T. G. Stagg, 



1 



1 



1856 and 1857. 



St. Inigoes, 



Rev. James Stephenson, 



7 



4 



1860 to 1869 inclusive. 



St. Mary's, 



Rev. James Stephenson, 







1 



1859. 



Smithsonian Institution, 

 Washington City,' 





6 

 10 





 2 



1854 to 1859 inclusive. 



1820 and 1823 to 1835 inclusive. 



Josiah Meigs and W. G. Cranch, 



' Exclusive of Naval Observatory and Smithsonian Institution. 



