326 Meteorological Observations at Hudson, Ohio. 
their appearance whether snow is, or is not, falling at the time. 
This variety I call stratus, under which term I include all clouds 
which cover the heavens with a nearly uniform and unbroken 
sheet. It appears, then, that the stratus is the most common 
cloud at all seasons of the year except summer, when the-cu- 
mulus prevails. This is more strikingly exhibited in the follow- 
ing table, which is arranged by seasons. 
& 
Sum of both hours. 
3 
as 
pel 
53 
= Cirro- 
Si cum. 
TY 
25 }.13 
16 | 22 
93 ima 301 3 B3 164\151 3006 138 136 
More than half the clouds of winter are stratus, and nearly 
half those of summer are cumulus. The former, then, is with 
propriety called the winter cloud, and the latter the summer 
cloud. The cumulus is also more common at 3 P. M. than at 
9 A. M., a natural effect of the sun’s heat. 
The tothe trie table exhibits the average cloudiness of the dif- 
ferent months according to three years’ observations, 0 represent- 
ing a sky perfectly clear, 10 entirely overcast. For comparison 
Ihave added the observations made at Dartmouth College by 
Professor Young. ~~ 
HANOVER, ase eT 
MONTHS. 1g P.M. ¢ OP. M | 
x70 | Mee 
3.97 | 3.80 | 
4.39 3.39 
3.43) | 3.00 
3.12. | 2.64 
| 3.68 3.11.4 
1 Bee 1.97 
ear ts 
| §.08 4.60 
5.05 | 4:42 
4.17 | 400 
3.68 4.01 
aeEey lor pee gh a a ae gee Se fee 
