i66 
Analyses of Books. 
[March, 
temperature reaches 6 4 ' 5 8» F„ and that of the winter 50 - 4 ° 
higher in fadt, than that of the South of England,— host is no 
exceptional phenomenon. In Montgomery, at about 32 4 N. 
Mt the Mst frost occurs, as a rule, between the 5th and 25th of 
April “ and when the last frost is recorded in March its adtua 
formation in April is prevented by unfavourable conditions, such 
as do X weather.” In the autumn the first frosts are usually 
experienced between Odober 10th and 25th. Thus little more 
than five months out of the twelve are absolutely safe from fro 
In the more northern parts of the State there is usua > 
one considerable fall of snow during the winter. . 
Concerning the local incidence of frosts an observation is made 
which coincides with experience in England and on the European 
continent. Frost is often more destrudhve i ir . valleys _than o 
the hills. This phenomenon is thus accounted foi .—As the air 
Is cooled it becomes more dense, and in consequence flows down 
the slopes to the lower levels, where it accumulates. 1 
vated lands are thus never exposed to the full intensity of fros s » 
for their position affords a ready way for the escape of the cooled 
air, which flows down the slopes as fast as formed, and the re- 
duction of temperature is in this way greatly retard . 
ether hand, the lowlands not only retain the cold air caused by 
their own radiation, but serve also as reservoirs for the cold a 
descending from the adjoining heights. Hence narrow valleys 
and plains extending towards the foot of hills are necessarily ess 
favourable for the growth of cotton, and other crops impatient 
of cold, than are hills of a moderate elevation. 
Report on the Cotton Production of the State 
F Account of the General Agricultural Features of the State. 
By E. A Smith, Ph.D. 
A fauna and flora of Florida would be for the naturalist a 
document of surpassing value, especially as both will shortly 
undergo destruaive changes from drainage operations and from 
the proi ebbed ship-canal. We find a list here of the most com- 
'rP timber-trees, shrubs, and weeds. One of the most trouble- 
”me of the latter is the yellow dog-fennel ( Helminm tenuifolmm). 
f, | t is eaten in the spring-time by cattle, and imparts an intensely 
bit CoVsidlri[Vthe™wiI.itude of this State (a+° 30- to 3;.“ NJat.) 
and the absence of eminences reaching 300 feet, the climate of 
this State should be semi-tropical. Still frost is not altogethei 
