Dodgeville chronicle. [volume] (Dodgeville, Wis.) 1862-current, 1866-11-01
Art and science.

Art and Science.
Mercury has twenty eight times less
heat conducting power than silver.
-Four tons of coal are estimated, with
proper machinery for fine work, to be equal
to twenty years of hard work.
Mr.. Burns, telegraph operator in
Worcester, Mass, recently sent 25O words,
containing l, 166 letters, in six minutes and
seven seconds.
"A man by the name of Perrot, offers
with new machine which he has invented,
which is moved by steam and exploded by
gas, to kill at the rate Of sixty thousand
men every twelve hours.
I'm life of fifty years man makes
upwards of $780, 900 respirations, draw
ing through his lungs nearly ITO tons
weight of air, and discharging nearly 20
tons weight of carbonic acid.
The density Of the moon is fve-ninths
less than that of the earth, while the second
satellite of Jupiter appears, if we may place
sufficient dependence on the determinations
Of magnitude and mass, to be even actually
denser than the great planet round which
it revolves.
The new anemometor at Greenwich
Observatory consists Of q circular plate,
having an area of two square feet, support
ed vertically on eight springs. 1t has q
directing vane which always keeps it facing
the wind, and the DETECTION Of the springs
according to the force of the wind, is
registered on q revolving table in the room
| below.
At one of the sittings of the French AS
| ISOLATION for the Advancement Of Science,
new instrument called the liquometre
was exhibited. 1t is intended for estimat-
| ing the amount of alcohol in wines and is
| based on the principle of capillary action.
1t consists essentially of a very fine grad
uated tube. The instrument is said also to
give separate indications of the amount of
tarter and extractive matter.
"A new fire annihilator is announced.
Hydrochloric acid gas is confined within
the limits of a cartridge, which may be
thrown by hand, or fired from an lnstru
ment, into the hearts of fires that cannot be
closely approached, and the effect is the
instant extinguishment of the fire. The
invention is vouched for by the Builder, a
reerectable scientific journal, and will be
| valuable if it can be relied upon. .e
M Memorski, of Vienna, confirms NJ
Brucke's observations, that diffused solar
light, instead of being perfectly white, is
tinged with red, just as the flames Of gas
or lamps are tinged with yellow. Diffused
light received at noon through cloudy sky
deviates by one twenty second part Of the
chromatic circle from the extreme red of
the spectrum towards the violet. The light
of burning magnesium, which appears to be
so like sunlight, has also tinge of violet.
"A mandatory for making printers
type of vulcanized India-rubber, has been
started at Dalston, England. This new kind
of type is said TO be quickly and easily made
and to be fully equal in quality and dura-
bility to the common type, the cost price
being only one-third of the latter. 1t offers
the advantage of less weight as compared
with metal type, and it can be remoulded
when worn. 1t presents particular advan-
tages for sterotyping. The invention is
American, and is said to be making rapid
progress in England.
The forative power and air-sacs and
hollow bones of pigeon, when the con-
tanned air is raised to the temperature of
the birds body, is less than grain weight
"a fact which proves that birds are sus-
tanned in the air solely by muscular exer-
ton. The air-sacs connected with the lungs
are supposed to be for the purpose of keep
ing up constant current Of fresh air over
the capillaries, which are naked in the
lungs. They open and contract in alterna-
ton with the lungs-that is, they expand
when the lungs contract.
"A correspondent, professional physi-
clan, in letter to the Medical and Surgical
Reporter, details the circumstances of o
case where patient had taken three ounces
of opium tincture, or laudanum, which had
exerted its effects three and q half hours.
Fluid extract Of belladona was then admin
istered in doses of twenty drops every ten
minutes, which in twenty minutes arrested
the progress of the opium, and in about
eight hours the patient was so far recovered
as to sit up and converse. The writer says
he is sure that belladopna saved this man s
life
By way of experiment, the engineer of
the company Joined the extremities of the
two cables which now stretch across the
Atlantic, thus forming an immense loop
line of three thousand seven hundred miles
He then put some acid in a lady's silver
tbimble with bits of zinc and copper, and
by this simple agency he succeeded in pass
ing signals through the whole length in lit
tie more than second of time. few
years ago, how incredible such statement
would have sounded 1t seems, indeed,
that the simplicity of the fact has taken
even electricians by surprise. When cable
was first laid across the whole length of the
Atlantic, it was anticipated chat an unusu-
ally high power would be requisite to drive
the current in sufficient force through such
a length. In the first instance, therefore,
they used battery with fifty cells, and aft
erward employed five hundred cells. But
this extraordinary power only injured the
cable, and the company are now working
between Valentia and Hearts Content with
a battery of only twenty cells. 1t is, in
fact, remarkable how greatly the sue
cess Of the present year has dissipated the
supposed difficulties of deep sea telegraphy
~ M Dress Well.
1t is the duty of all men, young and old,
| to make their persons. SO far as practicable