368 T. S. Parvin on the Climate of Iowa. 
frosts occur in the early part of this month, to the injury of the 
corn crop, which was the case partially last year. 
The average amount of rain is 3°90 inches, and the total in 
September last, 2°45 inches, which amount was ‘increased in 1852 
to 8°30 inches, and diminished to 1-13 inches in 1853. 
October—The Autumns are always delightful in the —_ 
round about Iowa, and this is the pleasantest of its months. 
mean temperature of this month differs from that of the season 
_by being only ‘53° greater, and exceeds that of the year 1:99° 
only; while April approximates to within ‘05° of it 
‘The mean temperature is 49°67°, while the range is s from 44°15 
to 54: ad , in the years 1850 and 4 respectively. 
e amount of rain in this month is 5°21 inches; the mean 
3°45 ra In 1850 there was only ‘20 inch, itr ¥ the greatest 
was the last year, when the latter part was very w 
The river rose several inches in the latter part of “this month, 
November—This is the last month of the physical yeas and 
closes the autumn or fall season. The mean temperature for 
1856 i as 32°79°, and the average mean 35°60°. The consecutive 
years of 1852-58 furnish the extremes of means, the first being 
30-00 and the last 39°73°. 
This month was very wet, and more disagreeable than any for 
several years past, showing’ an entire absence of our usual “ In- 
Summers.” The mean amount of rain is for November 
3°23 inches, the total for 1856, 3°83 inches, an excess of “60 inch. 
Tn 1854 the amount was only ‘09 inch, and in 1852 it was 5°50 
inches. 
December.—In our tables, extending over the period of seven 
years, we have included December 4 1849 and excluded it for 1856. 
The mean temperature, however, of this month for this latter 
year is less than any of the preceding, being only 15°68, 686 
ee see the mean, which is 22°49°, the maximum being in in 1854, 
In December, 1853, there was no rain; in the preceding yea 
the amount was 5: 00. inches; in the last December it meaabed 
6-05 inches, while the mean is only 1°75 inches, showing an eX 
“ie 4°30 inches. ne River (Mi opi) a 
@ average iod of the closing of the River (Mississt 
me st of this Soa a this year car ito closed suddenly on the night 
othe with a low stage of water 
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