Iron County register. [volume] (Ironton, Iron County, Mo.) 1867-1965, 1882-08-24
Heat and Cold.

Il Heat and Cold.
In the Nineteenth Century Prof.
Frankland gives interesting results of
Investigations conducted by him into
the causes and extent of the difference
IN the climates of town and country
de lays much stress upon the indcence
OF the color of the surroundings in modi-
Tying the cold of the air. AS every
body knows, there is great differ
ence in the nature of the heat from an
open fre and the heat from stove.
The heat from fire passes through the
AIR OF the room without warming it,
and is then reflected back from the
walls and furniture. A stove, on the
contrary, warns the air directly by
contact. Hence it is that draft is I'M
endurable in room heated by an open
fire, because it is a stream of cold air
that is brought in contact with the
body, whereas in stOve-heated room
the moving air is warm and the draft
Is not felt. Now, outdoor climate is
made up of these two kinds of heat, and
may be called sun warmth the other
resembles the heat from q stove, and is
properly described as air-warmth. The
winter-warmth as we get it is that re-
sembling the warmth from an open fire;
the winter-warmth in snowless coun-
try is similar to that derived from stove
heat.
| The greater the proportion of the SUM-
heat that is absorbed by the surround
ings, the less is the portion reflected in
to the air, and the lower is the temper
AZURE of the air. The power to absorb
heat depends almost entirely upon the
color of the object. Prof. FARMLAND
gives notes of experiments conducted by
himself with the object of showing the
heat-absorptive powers of various SUBJ
stances. From observations taken at
the same place and at the same moment
| he found that the amount of sun-heat
reflected by different objects differed
extremely. Thus, at the same moment
when white paper and white linen re-
| Elected 116 degrees Fahrenheit of heat,
| black silk and black merino reflected 81
| degrees and so degrees respectively. At
the same time thermometer held above
snow marked Ill degrees, and one held
above green grass marked SO degrees,
above parched grass 95 degrees, and
above gray rock SO degrees. The author
| gives this instance: At Bellagio, near the
sea-level, he found a sun-warmth of ~
degrees most oppressive, while on the
summit of the Diavolezza Pass, though
the sun-warmth was 107 degrees, he eX-'
perienced sensation of delicious cool
ness. At Bellagio, however, the real
temperature of the air was S3 degrees,
while on the Diavolezza the air-warmth
was only As degrees. This great differ
ence between the sun-warmth and the
air warmth at the two places arose from
the fact that at the latter place he was
getting reflected heat from the snow,
while at BellagiO the dark soil was alb
sorbino the sun-heat. The reflected heat
was, like that of fire or of a Canadian
winter, exhilerating and bracing; the
air-warmth. like that of a stove or steam
pipes. was depressing.
The author then goes on TO apply
these lessons to practice. People who
live in countries where at any time of
the year heat is deficient should build a
wall twenty or thirty feet high on the
north east and west sides of the grounds.
whitewashing the inner face of the wall
so as to reflect the heat. If on the
northern shore of body of water, the
house should be in such a position that
the sun can be seen from sunset to SUM-
rise reflected in the water; then it will
get heat reflected therefrom, not other
wise. The soil should be light colored.
Yellow sand or gravel reflect heat
very well. With these conditions, pow
erful sun-warmth and a bracin. air
might be secured If we want the air
of our streets to be warmer, all we have
to do is to whiten the houses. Of course
it follows that if we want cool streets
we must darken our houses; and the
question arises whether the semi-an-
nual blackening and whitening of all
the houses should not be made compul-
sorry upon the conscript fathers of all
reDuted health resorts.
Prof. FARMLAND SAYS that practi- |
cally the color of house makes no diff |
ference to its inside temperature, ex-
cept with respect to the roof, the color |
of which makes a very great differ |
ence. In bright sunshine states become |
so hot that the hand can scarcely be |
borne even on their outside surfaces. |
Whiten the same states, and the inside |
remains cool. As to internal coloring,
the author SAYS that the tints of wall
papers and furniture do not cause /
much difference in the amount of fire. |
heat received and radiated. We regret |
having to make ST statement so favorable |
As this to the somber Wallpapers now
in vogue. 1t is not to be doubted, |
though, that dark Wallpapers do alb
sorb, and so waste light. if they do re-
fleet as much heat as white papers; and
we trust their reign will be short
Toronto Globe.