Evening star. [volume] (Washington, D.C.) 1854-1972, 1931-07-05
Scientists of Carnegie Institution Haze
- Measured the Human Body Heat
Making Machine and Found That Sex,
b Height and Weigh Ill Haze q Direct
Influence ON Your abilities toKeep Cool
in Hot Heather or to Keep Mann TN
Cold Weuther.
BY JANE STAFFORD.

+ BY JANE STAFFORD.
can practice yourself The hrst step
u IN 70 cut down your heat production
~ Your body is like q machine that
is running all the time, and as 1t runs
1t produces q certain amount Of heat.
This heat comes from the transformations
IN matter that are constantly gong On III ue
human body.
such changes in matter are always &C
companied by changes IN energy or neat
changes" explains DR. Francis @. Benedict
director of the Boston. Mass, Nutrition Lab
Oratory of the Carnegie Institution OF WASH
ington DR. Benedict has spent many years
studying these changes in thousands OF men,
women and children under dnerent conol-
TONS and has reached interesting conclusions.
1.-The body is constantly changing" he says.
.sWe cannot have life without these changes.
Even If one is lying quietly asleep, still these
changes are continually going on, vital changes.
and it is important for to realize that life
itself is the cause of these changes.
SO you cannot stop the heat production
of your body entirely in your efforts to keep
cool Some of this heat is required TO Keep
the body machine running. Furthermore,
as long as the body machine runs, even IL
it Is throttled down to idling speed 1t Will con-
tinue to produce some heat.
However, you can keep the heat proooc-
tiOn down by diet and rest.
Food is the chief fuel that keeps the body's
fires going and makes life possible
'\A/HEN man gets up from the dinner
w table after q good meal and lies down
for q siesta his heat production Is ut
Its highest so far as the internal changes
are concerned for the effect OF the digestive
processes is added to his basic or resting needs
for hfe," DR.. Benedict explains. If he goes
for q walk plays golf or bowls his heat
production or metabolism is much greater.
Digestion Is q very important process. The
heat production may be increased 40 per cent
after q heavy meal, and the increase may
last from 10 to IL hours, gradually lessen
ing In intensity toward the END OF TINS Time
rs digestion is finished"
Some foods produce more heat when they
ere burned than others, just as coel makes
hotter fire than wood. The heat produced
by food when 1t Is burned in your body Is
measured by the calOry.
This familiar term is not q measure Of tenn
perature, but Of energy or OF heat Wnen
one quart Of water rs heated 20 that It's tenn
peratnre is raised three degrees Fahrenheit, 1t
will absorb about calory Of heat. In the
process of heating anything heat rs absorbed
whereas in combustion, heat Is given on.
Two tablespoonfuls Of sugar for instance,
produce 100 units of heat, calories when
they are burned in your body. Dfetitians and
nutritionists sometimes classify foods rs high
calory low calOTy foods.
The high cAlOry foods are those winch are
di0ested with great heat production. They
are the foods you want to eat sparingly IN
hot weather The low calory foods are d.
Rested with very little heat production. 80 you
can fill up on them during the dog days.
"A MONG the high calory foods are meats.
n nuts fats, sugars and starches. Veg
etables and fruits low calory foods.
ice cream, one of the favorite hot weather
foods of America, is not so cooling Is 1t feels
while you are eating 1t. 1t is made chiefly
Of sugar and cream, both Of which belong TO
the high calory list of foods. Water ices are
better hot weather eating, because, being
made without cream, their caloFic content rs
not 50 high
Another factor which increases your heat
production is the physical exertiOn you make.
scientists have found. When you are resting
In bed before breakfast, your heat production
1t at It's lowest level. You only pfoduc-
ing one calory a minute. If you sit up, the
heat production increases somewhat, though
not very much
Moderately rapid walking, however increases
It bout 200 times, while violent exercise makes
your body fires burn extremely fast with con-
sequent enormous heat production. foot
ball player playing very hard produces about
900 calOries in one hour, DR.. Benedict found.
The same amount of muscular exertion in the
line Of work produces a similar increase In