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



287 



(Nos. 105 to 107.) 

 Observed as follows : — 



Northeastern Illinois. 







Aggregate 





Place of observation. 



By whom observed. 



length of 

 time. 



Date. 







yrs. mos. 





Aurora, 



A. J. Babcock & A. Spaulding, 



6 4 



1857 to 1861 and 1865 to 1869 both inclusive. 



Batttvia, 



William Coffin and others,' 



3 7 



1854, 1857, 1858, 1859 and 1860. 



Belvidere, 



G. B. Mess, [Fitch, 



1 9 



1868 and 1869. 



Ciiannahan, 



Rev. D. H. Sherman and Dr. J. 



7 



1860 and 1861. 



Chicago, 



S. Brookes and others,'' 



14 11 



1845, 1856, 1857 and 1860 to 1869 inclusive. 



DeKalb, 



J. D. Parker, 



2 



1866. 



Elgiu, 

 Evanston, 



John B. Newcomb, 



3 11 



1858 to 1862 inclusive. 



H. G. Meacham and others,' 



2 10 



1860, 1864, 1865, 1866 and 1869. 



Farm Ridge, 



Elmer Baldwin, 



10 



1860. 



Fort Dearborn, 



Post Surgeon, 



4 



1833 to 1836 inclusive. 



Fremont Centre, 



J. H. Smith, 



1 



1857. 



Joliet, 



Brownson, 



6 



1843 to 1845 inclusive. 



King's Mills, 



Dr. A. and Mrs. Spaulding, 



8 



1869. 



Marengo, 



0. P. and G. S. Rogers, 



8 11 



1856 to 1869 inclusive, except 1864 and 1867. 



Magnolia, 



H. K. Smith, 



1 4 



1866, 1867 and 1868. 



Monroe, 



Silas Meacham, 



1 5 



1849 and 1850. 



Naperville, 



L. and M. S. Ellsworth, 



2 



1860. 



Ottawa, 



Dr. .J. 0. Harris and others,* 



15 6 



1854 to 1869 inclusive. 



Riley, 



E. Babcock, 



11 1 



1856 to 1867 inclusive and 1869. 



Rochelle, 



Daniel Carey, 



3 5 



1866 to 1869 inclusive. 



Sandwich, 



N. E. BuUon, M.D., 



10 11 



1859 to 1869 inclusive. 



Waukegan, 



Dr. William Joslyn, 



3 



1849. 



Wheaton, 



Prof. Geo. H. Collier, 



2 10 



1857, 1858, 1859 and 1861. 



Woodstock, 



Geo. R. Basselt, 



11 



1860 and 1861. 







Relative Prevalence of Winds from the 







Monsoon 







DlFKEHENT POINTS OP THE OOMPASS. 





II 

 3 5 



influences. 





H 





» 





.i 





i^' 









Place and 



Time of 





in 





in 





.Q-Si 





%n 



. 



Direction of 



ti o 







kind of 



the year. 





.Q . 









J^oa 





o^ 



t.3 



resultant. 



"S2 



Direction. 





observations. 





A 



wg 



^l 



W S 



.a 





■s 



^ s 



s'« 





° 3 





t 







^ 



fc'S 



W 



mi 



m 



ml 



^ 



laS 



D 





m" 





s 



f 



Spring 



216 



90 



70 



56 



100 



76 



80 



44 





N. 4° 5'E. 



.16 



N. 43° E. 



.19 



105. 



Summer 



154 



82 



75 



74 



85 



135 



90 



36 





N. 79 43 W. 



.03^ 



S. 79 E. 



.08 



Chicago, 



Autumn 



139 



52 



36 



74 



83 



144 



123 



92 





N. 88 43 W. 



.22 



S. 80 W. 



.10 



(Fort 1 



Winter 



94 



48 



34 



74 



130 



104 



132 



100 





S. 69 51 W. 



.23 



S. 44 W. 



.14 



Dearborn). 



The year6 



603 



272 



215 



278 



398 



459 



425 



272 





N. 78 32 W. 



.12 







s •». r ^ " I" 



Spring 



135 



261 



163 



174 



210 



435 



381 



266 



"64 S. 71 41 W. 



.213 



N. 20 E. 



.11 



.2 f 



•g 3 



Summer 



57 



152 



112 



245 



176 



492 



216 



184 



131, S. 36 49 W. 



.285 



S. 48 E. 



.09 



O " 



"S '■§ ■ 



Autumn 



49 



200 



102 



223 



235 



645 



269 



263 



75;S. 47 11 W. 



.337 



S. 9 W. 



.06 



i"^ 



o t 



P5 g 



Winter 



80 



113 



96 



147 



206 



370 



438 



198 



57,S. 64 7 W. 



.365 



N. 82 W. 



.09 



ap 



The years 





















S. 54 7 W. 



.291 







CQ . 





Spring 



1312 



2174 



901 



1016 



1741 



2801 



3183 



2101 





S. 88 16 W. 



.223 



N. 24 E. 



.16 



« o 



Summer 



348 



766 



540 



1196!ll29 



3629 



1448 



1402 





S. 49 10 W. 



.359 



S. 8 E. 



.09 



Is 



O _ij 



Autumn 



196 



1386 



597 



1111 



1354 



4515 



2249 



1824 





S. 56 44 W. 



.381 



S. 30 W. 



.07 



L 



Winter 



326 



711 



793 



1005 



1312 



2352 



3129 



1347 





S. 63 W. 



.365 



S. 76 W. 



.04 



&S 



The year^ 





















S. 62 16 W. 



.322 







a ■" 



■it[ 



Spring 



9.72 



8.33 



5.53 



5.84 



8.24 



6.44 



8.35 



7.90 













o 5 



Summer 



6.11 



5.04 



4.82 



5.88 



6.41 



7.38 



6.70 



7.62 













m .2 



" s 1 



Autumn 



4.00 



6.93 



5.85 



4.98 



5.76 



7.00 



8.36 



6.94 











S'" LsaJ 



Winter 



4.07 



6.29 



8.26 



6.84 



6.32 



6.36 



7.14 



6.80 











■ T. Mead, M.D., Wm. Coffin, E. Capen and F. Crandon. , t ti 



2 G. D. Hlscox, M. C. Armstrong, J. H. Roe, G. A. Boetner, A. M. Byrne, .J. 0. Donoghoe, .T. A. Pool and J. H. 



Langguth ; several independent sets of observations. 



3 C. E. Smith, A. D. Laugworthy, W. H. Morrison, H. W. Scovill, .Joseph H. Gill, F. J. Huse and 0. Marcy. 



* G. 0. Smith, M.D., S. L. Shotwell and Mrs. Emily H. Me.win. 



^ From this table we obtain the following snmma-y of results : — 





— 



- 



Spring. 



Summer. 



Autumn 



Winter. 



The year. 



Average velocity of all winds in miles per hour 



7.52 



6.40 



6.66 



6.66 



6.81 



Velocity in mean direction, on the supposition that the winds 













from every point of the compass move with the foregoing 













average velocity ......... 



1.60 



1.82 



2.24 



2.43 



1.98 



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 ....... 



1.68 



2.30 



2.54 



2.46 



2.19 



Excess of the latter over the former ...... 



+ .08 



+.48 



+.30 



+.03 



+.21 



5 Computed from the resultants for the seasons. 1 



