JMiscellanies. 159 
one which indicated the most heat. ‘This, however, in these cases, 
cited to make my meaning clear, is theory only, for I never have 
_tried the experiment, although so perfectly easy of trial.* As to 
the effect on pine leaves ee the tea-kettle, I speak from experi- 
ence and repeated observation. So, also, as to what is assumed of 
the different degrees of temperature of living and dead vegetable 
roots, in my last No., a reference to which will show the bearing of 
these remarks upon the true philosophy of scientific agriculture. 
While the dead branches of the limbs and twigs of the pine tree of 
the same grove, are seen covered with the ice and the snow of win- 
ter, long after its storms, those of the living tree, and its leaves, are 
as free as insummer. They are even giving out their caloric to the 
atmosphere, like deep water attempering its severity of cold; while 
the deciduous trees, from the power of extreme cold, are splitting 
from their centres, with loud reports, like signal guns. 
Where is the farmer, with a grove of evergreens near him, access- 
ible to the “locomotives” of his barn-yard, who has not seen with 
what avidity they retire to its friendly shelter, in winter, and with 
what reluctance they leave it, even after having finished the chewing 
of the cud, while wanting a new supply for their ruminating func- 
tions? And where is the farm, on which this luxury has been pro- 
cured, by human effort? From necessity, our fathers cut down our 
groves, and too long perseverance in the first habit of every new 
country, has made us wasteful in the extreme. For where, also, is 
the farm, of twenty, thirty or fifty years old, on some one or many 
of the fields of which, it would not now be desirable to have the de- 
stroyed groves of wood restored, either as skreens from the wind, for 
use as timber, or for ornament? I know of no one, from cold and 
bleak New England to Georgia, or from the Atlantic to the Ohio. 
The common opinion seems to be, that groves of evergreens are 
in winter, warmer than those of deciduous trees, only by the greater 
obstruction they afford to the currents of the air, in winds and storms. 
Hence so little use has been made of them, either as artificial skreens 
for the live stock of the farm-yard and the barn, or as a protection 
for fruit trees, and the orchard, and the garden. JI once commenc- 
ed an experiment of this sort, upon a new farm, by a circular belt of 
* re 
* The author’s views require to be verified by careful experiments, made under 
circumstances exeluding the influence of extraneous causes. 
