Meteorology. — 439 
January number of the American Journal of Science, has requested ob- 
servers along the Mississippi to furnish data as to the quantity of rain fall- 
ing during the year in their respective localities. In accordance with this 
desire, I here give the result of ten years observation at this place. 
Quantity of atmospherical water (rain and snow water) which fell at 
St Louis, from 1837 to 1846. 
| M. . 
Years. | Jan. | Feb. | Mar. Apr. | May. |June. | July. | Aug. | Sept. spiel hed Dec. | Total. June, 
Pe : uly. 
1837, | 0-97} 1°62) 2°84) 3:27] 3-o1| 4-15] 0-89) 2°36} 2°83} 0-42, 2°33) 2°31) 27°00] 8:05 
1838, | 3-72) 1-11] 1-51| 3-36} 1-68] 3-73 3 4°47} 0°06] 3-06 2- 44} 28-36, 8-54 
1839, | 2-21! 2-50] 2-60! 5:46} 7°93] 7°26] 5-71| 2°89) 2°45] 3 48| 2-00} 47°45} 20°90 
“90 3- -87 . 5 . 
1844, | 3-361 1-73) 4-84 3-86,11-26| 6-85) 8-13] 0-45) 0-30 2°25) 1:09) 1-61 
1845, | 1-83, 1-07| 3-48) 2-26 4-44) 9-93) 4-75] 6-21| 1-03) 1-16 1-10 aaa 1912 
gf 841 353] Bol O84) & 10°89 7 
1846, | 1-98) 1-27) 1-29] 4-841 3-53) 5-91] 0-84) 4-73) 4°84] 2°72) 2°11 452 58 
ae Dielstelny 9212. QFE) se OE. Sa F202 Fl Dem QE ne BHE'2. WR 44 PJ 20. ,fF\. 2.22 
» , ae / 49 + 4 {Or\= / 2USY LI V4 / 
Years, Jan. |fel July. :Aug.Sept June. July.| 
1837, |6 |11| 6| 5|10|10| 8 | 7| 8|5| 8| 6} 90 28 
1838, | 8 |1 5| 49 8 i Ge By 2 51 78 18 
1839, | 9 5 |g fro par pg oo? 6449 10 | 95 3r 
1840, | 9 8 iit! 8| 9g |10 |12] 5} 71 7} 3} 94 97 i iy 
1841, |10 i041 418 4\ 4 2 9| 7 g ar 
1842, | 3 7\|10| 8] 11 |10 | 7| 6 7| 5] 89 29 
1843, | 6 10 | 9/12 4 g 8/11! 7] 98 
1844, 15 110 |} 16 |-14 | 11 3 6} 61} 5 }106 41 
1845, 3 6| 7]1r} 6] 18 | 6 |12| 3141 54 74-90 30 
1846, | 8 | 9) 9 |12| 7} 11] 4 10] 9/9 |_7,j10°] 205 22 
Mean) | _ 
atid 73) 77/84 | g°4| 87 [110] 7°6 | 7°1 | 5:4 | 6-7) 7°7) 65) 935 27°3 
It will be observed that the quantity of rain in the first two years is 
smaller than in any of the following, and it may be that the rain-gauge, 
then employed, was imperfect ; I substituted another one for it, which has 
nin use ever since. June is almost always the wettest month; 
and from May to July, not only the greatest quantity of rain is precipi- 
tated, but also in the heaviest showers during the shortest time. They 
are mostly thunder-showers, especially from the middle of May to the 
middle of June, which is our rainy season. These rains occasion the 
Tise of our streams about that time much more than the melting of 
