Mineral Point tribune. (Mineral Point, Wis.) 1869-1938, 1877-03-21
MECHANICAL AND SCIENTIFIC.

-SpluerS are, us RUE, SelllSH ard We
i0us in their treatment OF their fellows :;
but a writer in HdrdtDicbe'S Science
| Gossip states that Ire once witnessed
an amicable relation established be-
tween two. a fly, too large to be handled
alone, bounced into the web of one,
when her neighhor ran to her assist
ance, helped her to secure the victim,
and then sat down in the most friendly
manner at her table, and supped with
her off the tly's savory juices.
The cause of the deterioration Of
the human teeth among civilized races
has been ascribed TO a lack of Sulli-
cient exercise Of chem by grinding
hard food. Barbarous tribes have
generally white and sound teeth, al
though a brush or dentifrice never
cleanses them. The explanation is
found in their habit of eating 50 much
hard food that requires good deal of
mastication. TO give the teeth a sufli-
cient amount of exercise. the chewing
daily of a teaspoonful of raw wheat
is recommended. The remedy is not
unpleasant, as many can testify who
have when children been fond of
chewing the sweet grains of wheat.
A description is given in the Nom
iteuy I1lduStriel Beige Of the famous
Marguerite bridge, recently finished
and opened. The total length of the
structure is $40 meters, and its
width II meters. 1t is formed
of SIX arches, three at each side of the
river, and Of which the openings are
respectively "a, SO and IS meters. The
centers have 4 radius of 135 meters
they are of wrought iron, and bear
plates on which rest the Macadam and
the wooden pavements. The construc-
ton consumed 100000 pounds of
wrought and cast iron, and 10000 GU
bic meters of masonry, including
$500 of granite and 5000 of other
kinds of cut stone.
M. Meyer, of Hamburg, asserts
that all mental diseases fall into two
great classes. In one Of these the
mental action exhibits the state of the
intellect below the normal intelligence,
and here there is evident weakness or
confusion of mind; this diseased con-
brain-and if, in case of any patient
of this class, there appears state Of
excitement, this excitement indicates
at once fever. In patients Of the sec
ond class, DR.. Meyer says the mental
strength is not below the normal
standard, but the intellectual activity
is wrong in direction; the insanity in
case of this class is sympathetic or
reflected, that is, it does not arise from
a diseased brain, but the cause is to be
sought III some other organ and part
of the body.
An ingenious Contriyance for the
| alr-casing of steam-boilers has been
| brought forward by a London engi-
neer. Every one acquainted with the
manipulation of Steam-boiers knows
! how important it is to prevent as lit
| tie heat as possible escaping by radia-
ton into the surrounding atmosphere,
it being the waste of heat by this
| means that chiefly make bOier-rooms
| and stokeholeS hotter than il is desir-
able they shoIld be. To prevent this,
as well as to secure some other impor-
! tant advantages, is the design of this
| air-casing. 1t is placed over the boiler,
! but leaving space of from two to
! three inches between. All the air sup
| piled TO the stokeh0le passes over the
! boiler, but under the casing thus pro-
yided, and in this way radiation is ar
rested. The plan is said to be as efli
| Gent as it is simple.
Careful experiments, extending
over IA series of years, plainly indicate
| that the food OF a healthy man, en-
gagged in manual labor, should contain
a regular daily supply of about three
hundred grains OF nitrogen and forty
eight hundred grains Of carbon.
Among badly-fed operatives subsist-
! ence has been known to he maintained
on one hundred and seventy grains
of nitrogen and thirty-six hundred
| grains Of carbon; but that was attend
| ed with feeble health. The amounts
required IN health may vary, accord
| ing to circumstances, such as temper
| ature, the moisture of tn e air, and the
amount of the muscular work per
/ formed but the average to be main
tanned is as already stated. Little or
/ nothing is known of the supply need
/ ed for FRAMEWORK, nor do scientists
| pretend TO understand much about the
needed supplies OF elements present in
/ the body other than carbon and nitro
gen, nor even what difference i makes
whether they are supplied with regu-
/ larity or not.-Chicayo Times.