The Port Gibson reveille. (Port Gibson, Miss.) 185?-1857, 1853-06-08
MISCELLANEOUS,
Fromhe ". u. Etening Post.
s,mc Facts Worth Remembering.

4 vigorous man brcathcs from his lungs
each day. about thirteen ounces Of pure car
b5n This quantity Of carbon is equivalent
to an equal weight Of pure coarcoal, burnt
daiy IN his lungs. 10 deyelope the electro.
dynamic excitation or constituting animal
heat and animal motive power. At this rate,
man burns about twice his weight Of carbon
every year, and in the allotted term Of three
score years and ten, consume about ten tons
II carbon or charcoal, in developing animal
heat aud motive power
By exposing dried blood in q covered cru.
cible to a red heat, residuum Of charcoal
will H. lef. which canno. be distinguished
from the charcoal left, in the same crucblc.
after wood, bread, sugar, flesh, &c, have been
similarly exposed.
The quantity Of air passing through the
lungs Of man Of ordinary size every twenty.
four hours, has been found to be 266 cubic
feet, Of which 20l cubic feet are changed into
clrbonc acid gas.
II the supply Of oxygen and hydrogen is
cut olI Or diminished, the combustion OF car
bon will diminish in a corresponding proper
ton, and the physical strength and locomo-
tive power Of animals will also diminish
Hence. on ascending mountains as the air
becomes more dense, il contains less oxygen,
and men and animals sooner begin to pant,
as ii they had been running, in order to sup
ply themselves with the oxygen with which 70
consume the carbon in their food.
Active exercise produces rapid breathing,
and consequently greater amount OF oxygen
enters the system, aud produces a more rapid
combustion Of carbon. II the supply Of oxy-
zen is cut of in any way as by working IN
unyenlilatcd apartments The power Of the ope.
ratire i soon exhausted. Hence the most
improved workshops in Englind are supplied
with fresh air by the mechanical power Of the
machines
A horse consumes about eleven pounds Of
carbon and hydrogen daily, in the form offood;
but only about five and half pounds ayoirdu-
pois appear to Be burnt in his lungs, from
whence il is inferred that half Of his food is
wasted.
This is owing to the imperfect mastication Of
wiry, dry hay, on which lie is fed. Liebig
considers the frces OF animals to represent the
imperfectly burned or oxidized portion Of their
boi, and compares il 10 SCOT or lamp-black,
resulting from imperfect combustion in ordina-
~ furnaces
70 prevent this wasteful expenditure Of
carbon ruminating animals are provided with
muscles for bringing back from the stomach
% Tie mouth the solid ligneous fbres Of the
grasses, 50 as to subject them to a new masti-
cation and to extract from them the carbon,
which was not elaborated on the first chewing.
The time and labor required By horse or
an OK 10 masticate 25 lbs. Of hay, completely
prevents his being able TO work for man as
as many hours as a man can work. A man
can work twelve hours, a horse only eight. /
The reason IS that when the horse has finished
working for his master, he must turn miller
and spends several hours in grinding his dali
y grist for supper, before he can lie down to
rest. Mans hours for labor would not exceed
eight, ifhe we're obliged to chew bis raw wheat
and corn, instead Of availing himself Of the
services Of the miller and the baker. Hence,
~ Holland, horses are frequently fed with
grain reduced TO the form Of loayes. A wise
economy would lead those who use beasts e