The Pulaski citizen. [volume] (Pulaski, Tenn.) 1866-current, 1873-05-29

their texture and taste, is furnished By
Boussingault 70 the academy Of sciences
of Paris. In a recent communication
to that body, be states that, as long ago
as 1865. he exposed beef bouilIon in
hermetically sealed vessels to the action
Of freezing mixture At a temperature
of four degrees F., keeping the same
immersed IN the mixture for several
hours. On opening these vessels, quite
lately, he found that the contents had
undergone no change, and were precise
" rs before being submitted to the
cola. The juice Of sugar cane, exposed
IN a closed vessel to a similar degree of
cold, was also preserved from any alter
alton Boussingault refers IN his arti-
Gle to the fact, well known to geologists,
that low temperature, continued for
ages, prevents the decomposition OF
muscular fiber, instancing the fact Of
the discovery in IsO4, at the mouth Of
the Lena river IN Siberia of an elephant
buried in ice which was so well pre-
served as TO serve as food for the dogs
Of the mitive tribes.
hnURR DRINKING WArER.-Set a
pitcher Of iced water in a room inhabit-
ed, and in n few hours It VIII have alb
sorbed nearly al the perspired gases Of
the room, the air OF which viii have be-
come purer. but the water utterly
filthy. This depends on the fact that
water has the faculty Of condensing and
thereby absorbing nearly all the gases,
which it does without increasing its
own bulk. The colder the water is, the
greater its capacity to contain these
gases. At ordinary temperature, pint
of water viii contain pint of earbonic
acid gas, and several pints Of ammonia
This capacity is nearly doubled by re-
ducing the temperature to that of ice.
Hence water kept IN the room awhile is
always unfit for use, and should be Of
ten removed, whether it has become
warm or not And for the same reason
wat T in a pump should all be pumped
out IN the morning before any is used.
That which has stood in a pitcher over
night is not fit for coffee water in the
morning. Impure water is more iniu-
rious to health than impure air, and
every person should provide the mean
of obtaining fresh, and pure water for
all domestic uses.
WBoUGHr-IRoN RAns.-The question
as to the strength of wrought-iron, and
the effect produced on the structure of
the metal by wear and tear, is one that
has been much discussed since railways
came into operation, and is not yet set
/ tied Experiments made recently in
France gave results which are worthy
of notice. A wrought-iron axle, two
and-a-half inches diameter, was twisted
10, 800 times, and subjected to -. 100
shocks without changing the texture of
the iron. Another, after 129, 600 twists,
showed no alteration to the naked eye,
but when examined by a microscope,
was found to be a mass of fibers re-
sembling bundle OF fine wires. and
so it went on, the change in the struc-
ture Of the iron becoming more and
zaors, married the s-are the ssrd,s 7vas
twisted. In the concluding experiment,
the axle went through ten months OF
twisting, and more than 100, 600 turns,
and was converted into mass of crys-
tails. and had completely lost the ap-
pearance of wTought-iron. This con-
firms, what has been often demonstra-
ted, that, after long use, iron becomes
| unsafe.