(Noc. 101 and 102.) 

 Observed as follows : — 



SERIES B. ZONE 10. LAT. 40° TO 45° N, 

 Western Illinois, latitude 40° to 41°. 



285 







Aggregate 







Place of observation. 



By whom observe 



length of 

 time. 



Date. 









yrs. moa. 







Augusta, 



Dr. S. B. Mead, 



15 



1854 to 1859 and 1861 to 1869 both inclusive. D 



Carthage, 



S. J. Wallace, 



1 



1856. 





Elmore, 



W. H. Adams, 



4 4 



1864 to 1869 incl 



usive. 



Galesburg, 



Prof. Wm. Livingston, 



8 10 



1861 to 1869 incl 



usive. 



Macomb, 



Richards, 



3 



1843. 





Mount Sterling, 



Rev. Alexander Duncan, 



4 



1866 to 1869 inclusive. | 



Pekin, 



J. H. Riblet, 



8 7 



1857 to 1865 incl 



usive. 1 



Peoria, 



F. Brendel and M. A. Breeii 



, 15 



1856 to 1869 incl 



usive.' 1 



Warsaw, 



B. Whitaker, 



2 5 



1S56, 1857, 1S6S and 1869. 1 







Rklative prevalence of Winds rr.our the 









Monsoon 







DlFFEBENT POIMTS OB' THE CoMEASS. 







fit: 



influences. 





h" 





W 





.^ 





i^' 









Kind of 



Timeof tlie 





i^ 





OJj 





^«j 





.= *! 





Direction of 



JJ^ 







observationB. 



year. 





°i 









o«i 





oS 



sl 





resultant. 



oS 



Direction. 









x 



Hg 



■s 



f4 S 



4 

 p 



^1 



■s 



^s 



si 







-, 3 





i 







i 



^1 



W 



!AS 



M 



oiB 



^ 



^s 



o 







W*' 





& 



C r._ 



'■§§ 



Spring 



151 



271 



236 



300 



340 



297 



375 



375 





S. 



53° 44' W. 



.108 







'c "^ 



Summer 



139 



228 



197 



304 



432 



517 



353 



290 





s. 



34 38 W. 



.234 







1-^ 



"S 'S ■ 



Autumn 



145 



195 



189 



225 



367 



443 



430 



345 





s. 



58 3 W. 



.241 









Winter 



123 



202 



164 



218 



253 



262 



383 



374 





s. 



80 31 W. 



.187 







giP 



s 1 



The year* 





















s. 



55 48 W. 



.181 







CO - 



f 



Spring 



1619 



3054 



2003 



2583 



3632 



3849 



4588 



6109 





s. 



82 55 W. 



.226 







^s 



■" w 



Summer 



990 



1388 



895 



1649 



3190 



4695 



2886 



2844 





s. 



.54 29 W. 



.320 







■CTtT- 



. -2 , 



Autumn 



1126 



1637 



1120 



1527 



3158 



4862 



4039 



4275 





s. 



71 39 W. 



.330 







.5 ^ 



^a 



Winter 



1004 



1496 



1095 



1887 



2625 



2689 



3948 



3977 





s. 



79 12 W. 



.277 











The year* 





















s. 



72 27 W. 



.278 









Spring 



10.72 



11.27 



8.49 



8.61 



10.68 



12.96 



12.23 



16.27 















= 9 



> fi 



Summer 



7.12 



6.09 



4.54 



5.42 



7.38 



9.08 



8.18 



9.81 















CO .2 





Autumn 



7.77 



8.39 



.5.93 



6.79 



8.60 



10.98 



9.39 



12.39 















S ^ 



lSS J 



Winter 



8.16 



7.41 



6.68 



8.66 



10.38 



10.26 



10.31 



10.63 

















r s . ■ 



Spring 



1024 



1961 



1572|l822 



2091 



1766 



2341 



2786 



323 



s. 



79 20 W. 



.08-1 



N. 19A° E. 



.09 







Summer 



835 



1649 



1635 



1789 



2957 



2464 



1814 



1578;i023 



s. 



12 1 W. 



.18-^ 



S. 42iE. 



.11 



o a 





Autumn 



937 



1284 



1289 



1694 



2475 



2109 



2608 



2417 



594 



s. 



56 18 W. 



.19 



S. 84 W. 



.04 



u .2 



&-% 



Winter 



929 



1358 



1084 



1841 



2188 



2340 



2852 



2320 



202 



s. 



60 3 W. 



.20 



N. 89 W. 



.06 







The year* 





... 

















s. 



48 24 W. 



.15 







a _ 



"s . r 



Spring 



249 



400 



225 



293 



347 



988 



1232 



1031 





N 



89 46 W. 



.41 



N. 12 E. 



.05A 



"■5 



° m 



Summer 



282 



319 



200 



305 



554 



1109 



1219 



900 





s. 



78 25 W. 



.42 



S. 22 E. 1.04' 1 



l« 



.if ■ 



Autumn 



170 



265 



223 



306 



400 



931 



1052 



783 





s. 



77 29 W. 



.41 



S. 30iW.'.04 1 



tc m 



s ° 



Winter 



116 



204 



148 



215 



191 



755 



953 



688 





s. 



85 8 W. 



.47 



N. 76 W.;.05 I 



E.2 



The year* 





















s. 



71 19 W. 



■44i 







^^ 



M . 1- 



Spring 



1273 



2361 



1797 



2115 



2438 



2754 



3573 



3817 323 



s. 



85 45 W. 



.16 



N. 15 E. 



.08 



> 



.2 '^ 



^3 S 



Summer 



1117 



1968 



1835 



2094 



3511 



3573 



3033 



2478 1023 



s. 



38 39 W. 



.20 



S. 38iE. 



.08^ 





V .9 



Autumn 



1107 



1549!l512 2000 



2875 



3040 



3660 



3200| 594] S. 



64 1 W. 



.23 



S. 68 W. 



.03 



la' 



Winter. 



1045 



1562 1232 2056 



2379 



3095 



3805 



3008 202 S. 



68 33 W. 



.25 



N. 89^ W. 



.05J 





P< o 



The year" 













S. 



63 26 W. 



.20 







• Two independent sets of observations reported in the year 1861. 





2 Including also Edgington and Rock Island in Northwestern Illinois. 





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







Spring. 



Summer. 



Autumn. 



Winter. 



The year. 



Average velocity of all winds in miles per hour . . . 



11.70 



7.53 



9.30 



9.46 



9.50 



Velocity in mean direction, on the supposition that the winds 















from every point of the compass move with the foregoing 

 average velocity ......-■• 



1.26 



1.76 



2.24 



1.67 



1.72 



Trne 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 



2.64 



2.41 



3.07 



2.62 



2.64 



Excess of the latter over the former 



+ 1.38 



+ .6 



) 



+ .83 



+.95 



+.92 



< Computed from the resultants for the seasons. 



