El Paso daily herald. (El Paso, Tex.) 1881-1901, 1899-08-10
A STUDY IN TEMPERATURES.
Difference Between Sun and Shade
Records of The Thermometer.

Mr.. 81. 81. Curley, of the United
States weather bureau at San Antonio,
has taken a nun Der of observations,
using maximum thermometers for the
sun and shade.
Observations were taken only at
times when the sun was not obscure6
by clouds. 1t was found that the tenn
Oerature of the thermometer was high
est when the sky was cloudless during
the entire day, and at times when
there was low percentage OF humidi-
ty in the atmosphere. The greatest
difference during the past week was on
Monday, July 81. On that day the
maximum in the sun was III degrees
and in the shade % degrees, showing a
difference of % degrees. On July %,
the maximum in the sun was 1851 de-
grees, in the shade "a degrees, but the
sky was obscured by clouds at intervals
during the day and the air was fairly
saturated with moisture.
On July 80 the maximum tempera-
ture in the sun was 1124 degrees, aud
in the shade, 50 degrees.
On August l there was a difference
Of 10 degrees between the SUI and
shade temperatures, the temperature
in the sun being lib degrees, in the
shade "a degrees.
IAN individual in ordinary health"
temperature provided the air is dry and
evaporation is taking place from the
body.
THE air being dry in high tenn
perature, evaporation takes place
freely from the body, and this produces
d cooling sensation on the exposed sur
face Of the skin.
The drier the air the greater the
evaporation. Several years ago eXper-
M - 9 = hss-4
tory OF manufacturing chemist in
New YORK city. IN order to success
fully conduct the experiments, it was
necessary to bring the ten perature Of
the labratOry 10 300 degrees Farep-
heit.
The experts conducting the expert
mengs found it possible 10 remain in
the labrstOry ten minutes at time. \
vessel of water suspended near the
center OF the room actually boiled dur- /
ing the experiments.
"a piece OF meat would be pretty |
we'll baked If exposed to this tempe ra- .
lure for q time, but the process of eva .
poration which takes place in live !
tissue keeps the surface OF the body !
cool.
1.-The surfaces OF the skin play very /
important part in respiration OF the
body. If two thirds OF the external SUI
ACE of the body be burned respiration
s so much reduced that recovery is
n possible.
''When exposed to the direct rays of !
jhe sun the SKIN receives more heas |
han is consumed during the process
Of evaporation and causes the exposed
surface to become dry and burned.
I'm the shade, however, if the air is
n motion, the exposed surfaces expert
snCe a cooling sensation and evapora-
ion is uninterrupted.
IN extreme southwest Texas and
northern Mexico 1t is not an unusual
hing for the thermometer to register
upwards OF 40 degrees in the sun dur
pe the summer months. AT such
lines the temperature in the shade
nay be say 100 degrees Fahrenheit.
The sensible temperature, or the tenn
1erature experienced at the exposed
urfaces OF the body, may be no higher
han Is degrees Fahrenheit.
ga case OF prostratiOn from heat is
are in a dry climate, but is very
common occurrence In the Mississippi !
Ind Ohio valleys. This is because the
atmosphere in the southwest and Rocky
Mountain districts is constantly rob
Ding the body of its moisture through |
he process Of evaporation. In high |
attitudes evaporation is so rapid that |
does not appear on the |
urface of the body.
'In the Mississippi and Ohio valleys,
10 well as on the Gulf coast, the air is
.lready highly saturated with moisture
md takes up little or no moisture from
he body by evaporation. The result
8 that the Precipitation Is not absorb
d from the surface of
he body, the pores of the skin become
logged and cause an oppressive Ian
'uid feeling"
Mooney pays the highest price for
.ood second hand goods. Remembe
Is s. Oregon st.