S. W. or be-
Etween S. & W.

West.

N. E. or be-
Getween N. & E.

Force.

N. W. or be-
Calm or

variable.
og tween N. & W.

20

36

103. Rock Island.

20

.08

January

42
29 17 35

38 40
February

35

15 11 52 16 37 40
March 27

21 14 76 21 32 31
April 45
32. 13 42

26
May

29

22 21 68 25 34 17 June

16

27 18 81 23 33. 19 July

29

15 21 72 33 40 21
August 27 27 33 20 64 37 24 16
September 46
23 23 28 48

29 23
October 25 21 26 19 56 28 53 20
November 38 15 35 14 32 46 33 28
December 26 10 30 16 46 39 55 26
Spring

101 88 75 48 186 66102 74 S. 30° 18' W.
Summer 72 67 75 59 217 93 97 56

S. 13 1 W.
Autumn 109 59 84 61 136 94 115 71 S. 54 35 W.
Winter

103

52 74 44 133 79 130 106 S. 87 28 W.
The year
385 266 308 212 672 332444 307 S. 43

9 W.
Spring 957 2155 1200 18691360 20401683 2598 239 N. 78 4 W,
Summer 772 1903 1096 1954 1649 30271167 1804 460 S. 23 8 W.
Autumn 748 1406 764 1406 1455 2488|1381 2317 457 S. 67 47 W.
Winter 677 1158 715 1506 1400 2128 1923 2476 247 S. 74 21 W.
The year!

S. 64 6 W.
Spring

103 318 107 279 165 662 753 671 S. 88 59 W.
Summer 104 256 137 220 132 904 880 646 S. 82 59 W.
Autumn 67 235 65 170 89 784 728 609 S. 85 49 W.
Winter 72 228 91 193 146 735 611 576 S. 82 OW.
The year!

S. 85 9 W.
Spring 1060 2473 1307 2148 1525 27022436 3269 239 N. 73 10 W.
Summer 876 2159 1233 2174 1781 39312047 2450 460 s. 49 4 W.
Autumn 815 1641 892 1876 1544 3272 2109 2926 457 S. 69 54 W.
Winter 749 1386 806 1699 1546 28632534 3052 247 S. 76 39 W.
The year

S. 73 23 W.

.23 .103 .16 .12 .07 .14 .17

Surface winds.

N. 361°E..09
S. 46° E. .09
S. 85 W..03
N. 88 W..09

.22

...

...

...

104. Aggregate number of obser

vations at all stations.

2 preceding Motion combined. of clouds.

.13 .52 .46 .50 .44 .48 .13 .18 .21 .26 .18

N. 30 E. .101
S. 34 E. 1.08
S. 464 W..02
S. 84' w..07]

Aurora,
Batavia,
Belvidere,
Channahan,
Chicago,
DeKalb,
Elgin,
Evanston,
Farm Ridge,
Fort Dearborn,
Fremont Centre,
Joliet,
King's Mills,
Marengo,
Maguolia,
Monroe,
Naperville,
Ottawa,
Riley,
Rochelle,
Sandwich,
Waukegan,
Wheaton,
Woodstock,

4

A. J. Babcock & A. Spaulding,
William Coffin and others,'
G. B. Mess,

[Fitch,
Rev. D. H. Sherman and Dr. J.
S. Brookes and others,
J. D. Parker,
John B. Newcomb,
H. G. Meacham and others, 3
Elmer Baldwin,
Post Surgeon,
J. H. Smith,

Brownson,
Dr. A. and Mrs. Spaulding,
0. P. and G. S. Rogers,
H, K, Smith,
Silas Meacham,
L. avd M. S. Ellsworth,
Dr. J. 0. Harris and others,
E. Babcock,
Daniel Carey,
N. E. Bullon, M.D.,
Dr. William Joslyn,
Prof. Geo. H. Collier,
Geo. R. Bassett,

7 9 7 11

2 11 10 10 0 0 6 8 11 4 5

0
0

1857 to 1861 and 1865 to 1869 both inclusive.
1854, 1857, 1858, 1859 and 1860.
1868 and 1869.
1860 and 1861.
1845, 1856, 1857 and 1860 to 1869 inclusive.
1866.
1858 to 1862 inclusive.
1860, 1864, 1865, 1866 and 1869.
1860.
1833 to 1836 inclusive.
1857.
1843 to 1845 inclusive.
1869.
1856 to 1869 inclusive, except 1864 and 1867.
1866, 1867 and 1868.
1849 and 1850.
1860.
1854 to 1869 inclusive.
1856 to 1867 inclusive and 1869.
1866 to 1869 inclusive.
1859 to 1869 inclusive.
1849.
1857, 1858, 1859 and 1861.
1860 and 1861.

1 1 0 15 11

3 10 0 2 0

1 5 11

3 10 11

N. E. or be. 8 tween N. & E.

S. E, or be.
tween S. & E.

S. W. or between S. & W.

North.

Ratio of resultant

to sum of winds.

.
ទិដីដី ។ west.

SEtween N. & W.

South.

N. W. or be.

Calm or
variable.

105. Chicago,

(Fort Dearborn).

94

Spring 216 90 70 56 100 76 80 44 N. 4° 5' E. 1.16 N. 43° E. .19
Sunmer 154 82 75 74 85 135 90 36 N. 79 43 W..031 S. 79 E. .08
Autumn 139 52 36 74 83 144 123 92 N. 88 43 W..22 S. 80 W..10
Winter

48 34 74 130 104 132 100 S. 69 51 W..23 S. 44 W..14 The year. | 603 272 215 278 398 459 425 272

N. 78 32 W..12
Spring 135 261 163 174 210 435 381 266 54 S. 71 41 W..213 N. 20 E. 1.11
Summer 57 152 112 245 176 492 216 184 131 S. 36 49 W..285 S. 48 E. 1.09
Autumn 49 200 102 223 235 645 269 263 75 S. 47 11 W..337 S. 9 W.1.06
Winter 80 113 96 147 206 370 438 198 57 S. 64 7 W..365 N. 82 W..09
The years

S. 54 7 W..291
Spring

1312 2174 901 1016 1741 2801 3183 2101 S. 88 16 W.1.223 N. 24 E. 1.16
Summer 348 766 540 1196 1129 3629 1448 1402 S. 49 10 W..359 S. 8 E. 1.09
Autumn 196 1386 597 1111 1354 4515 2249 1824 S. 56 44 W..381 S. 30 W.1.07
Winter 326 711 793 1005 1312 2352 3129 1347 S. 63 0 W..365 S. 76 W.1.04
The years

S. 62 16 W. -322
Spring 9.72 8.33 5.53 5.84 8.24 6.44 8.35 7.90
Sunmer 6.11 5.01 4.82 5.88 6.41 7.38 6.70 7.62
Autumn 4.00 6.93 5.85 4.98 5.76 7.00 8.36 6.94
Winter 4.07 6.29 8.26 6.84 6.32 6.36 7.14 6.80

I T. Mead, M.D., Wm. Coffin, E. Capen and F. Cravdon. 2 G. D. Hiscox, M. C. Armstrong, J. H. Roe, G. A. Boetner, A. M. Byrne, J. 0. Donoghoe, J. A. Pool and J. H. Langguth; several independent sets of observations. 3 C. E. Smith, A. D. Langworthy, W. H. Morrison, H. W. Scovill, Joseph H. Gill, F. J. Huse and 0. Marcy. 4 G. 0. Smith, M.D., S. L. Shotwell and Mrs. Emily H. Merwin. 6 From this table we obtain the following summary of results :

Spring 1551 4250 2742 2836 2596 4387 3872 3477 548 S. 67° 43' W..07 N. 53° E. .11}
Summer 1338 3557 25104 2718 29983 5603. 2987 2256 1146 S. 2456 W..15 S. 67 E. .105
Autumn 12984 2411 1673 2293 28374 5251 3594- 3501 890 S. 60 38 W. .23 S. 69} W..05
Winter 1213 1896 1370 2311 2804 5506 5041° 4241 540 S. 69 53 W..32, S. 85' w..14,
The year!

S. 58 36 W..181
Spring

413 622 415 291 453 1409 2073 1077 S. 89 9 W..41 N. 531 E. .05
Summer 348 554 340 254 529 1401 2389 985 S. 85 15 W..463 | S. 67 W..02
Autumn 233 414 282 272 371 1212 1792 871 S. 85 34 W..44 S. 58 E. 1.02
Winter 241 373 307 266 360 1314 2057 1034 S. 85 20 W..49 S. 69 W..04
The year

S. 86 13 W..45
Spring 1964 4872 3157 3127 3019 5796 5945 4554 548 S. 80 42 W..14 N. 52 E. 10
Summer 1686 4111 28504 2972 3527} 7004, 5376 3241 1146 S. 52 2 W..19 S. 65) E. .08
Autumn 153132855 1955 2565 32081 6463 5386 4372 890 S. 67 53 W..27 S. 65' W..03.}
Winter 1454 2269 1677 2577 3164 6820 7098 5275 540 S. 74 1 W..35} S. 845 W..12
The year!

S. 68 55 W..23

2 preceding Motion combined. of clouds.

Surface wind.

...

...

105

109. Aggregate number of obser

vations at all stations.

2 preceding Motion combined. of clouds.

Spring
Summer
Autumn
Winter
The year
Spring
Summer
Autumn
Winter
The year!
Spring
Summer
Autumn
Winter
The year!

110 215 139 225 263 288'

265 243 53 S. 44° 46' W..15 S. 68° E. .04 143 203 113 185 187 234 194 149 80 S. 40 17 W..08 N. 71 E. 10 102 108' 130 142 117 229 214 161 63 S. 64 34 W..16 | N. 4 W..03 95 115 67 135 263 308 234 278 19 S. 63 19 W..30 S. 72 W.,.13

S. 56 57 W..17 23 46 271 23 49 87

50 s. 74 6 W..32 S. 621 E. 1.064 27 20 13 24 37 20 84

7

S. 69 32 W..27 S. 72 E. .12 11 5 101 1 7 10 59 2 N. 88 44 W..51 N. 65 W..16 11 18 8 13 35 46 52 55 S. 81 25 W. .40 S. 89 W..03

S. 81 1 W..37 133

370 293 53 S. 54 15 W..18 S. 56 E. 1.03 170 223 126 209 224 254 278 156 80 S. 50 16 W..10 N. 76 E. .10 113 113 110 143 124 239 273 163 63 S. 70 01 W..18 N. 4 E. 1.03 106 133 75 148 298 354

286 333 19 S. 66 25 W..31 S. 73 W..12

I S. 62 21 W..19 | Computed from the resultants for the seasons.

261 166 248 312 375

...

hoico Calm or

701

111. Aggregate number of obser

vations at all stations.

Spring
Summer
Autumn
Winter
The year
Spring
Summer
Autumn
Winter
The year
Spring
Summer
Autuinn
Winter
The year!

110
158
127
54

2 preceding Motion coinbined. of clouds.

438 305 581 440 1016 923 771 305 S. 72° 16' W..27 N. 53,1° E..05 3:8 369 460 501 1215 924 648 456 S. 69 6 w..25 N. 71° E. 1.114 274 268 415 444 1026 827 781 307 S. 70 14 W.1.31 S. 794 W..02 307 252 434 289 1087 979 563 249 S. 66 43 W..34, S. 54 W..06

S. 69 20 W..29 173 155 209 200 474

351 S. 78 39 W..36 S. 79 E. .08 117 109 118 216 498 933 376 S. 83 31 W.1.51 N. 89 W..07 102 72 113 138 463 515 343 S. 83 8 W..464 N. 82 W..02 156| 106 148 81 470 557 277 S. 8330 W..411 N. 53 E. .02

S. 82 25 W..44 611 460 790 640 1490 1624 1122 305 S. 74 50 W..28 ' N. 68 E. .05 475 478 578 717 1713 1857 1024 456 S. 76 2 W..33 N. 28 W..01 376 340 528 582 1489 1342 1124 367 S. 74 25 W..35 S. 89 W..011 463 358 582 370 1557 1536 840 249 s. 70 42 W..37 S. 41+ W..04

S. 74 6 W..33

483
638
359
214

...

...

...

...

3 4 · 8 1 1 3 29 20 32 12 52 21 60 13 10 0 3
4 4 5 1 8 13 7 4 15 7 57 29 67 17 1
6 3 18 15 17 11 17 8 13 4 50 271 41 17 20

3
4 3 20 17 9 7 23 7 26 3 29 5 39 21 25, 3 13
8 171 211 11 12 5 24 2 15 4 44 5 48 12 30 3 4
11 4

4

0 25 3 14 8 56 6 39 12 23 8 2 6 4 17 3 0 33 5 5 2 76 5 31 14 30 3 6 7

2 27 1 14 1 30 5 23 1 33 3 24 16 39 0 14
9 5 14 5 10 4 21 7 10 13 571 6 28 11 31 4.

10 22 010 8 40 0 16 2 54 22 48' 22 22 0 101
0 1 6 4 0 33

4 23 8 31 24 37 4 9 1
6 10 12 9 5. 4 8 6 7 14 40 15 30 12 12 4
18 23 59 43 38 23 64 17:54 11 123 37 128 40 75 8 20 S. 66° 55' W..20
21 10 48 5 21 1 88 13 42 11 165' 14 94 52 92 11 22 S. 68 24 W.) .32

9 15 37 11 24 12 94 11 49 23 142 53 113 37 62 6 14 S. 52 40 W.1,36 13 18 25 11 14 20 44 30 54 33 149 65 157 42 31 7 S. 56 59 W..50 64 66 169 70 97 56 290 71 199 78 579 168 192 171 260 30 63 S. 60 5 W. .34

The year