The Princeton union. [volume] (Princeton, Minn.) 1876-1976, 1893-12-07
SCIENCE AND INDUSTRY.
INFORMATION RELATIVE TO THE
USEFUL ARTS.

More Exercise md Better Health
Improving the Circulation in Ma
rtnc Boilers-COpper Coating for
the Hulls of vessels-A New Respi-
ratOr. y:
DR.. A. SymOns Eccles has struck thu
Keynote of a radical improvement in
tie general health Of city communi-
ties when he says hat the most po-
tent factor of present day ailments is
the allegiance into which the muscular
system is allowed to fall by jewellers
in cities, who are daily becoming more
and more dependent on artificial means
of locomotion and or: labor-saving APP
paratus until disorders Of digestion and
nervous maladies are now as common
s.morg the comparatively poor as they
are among the wealthy. The rich man
endeavors to overcome the mischief
wrought by his sedentary life by horse
back exercise or gclf; but the poorer
man, who is unable to afford these
recreations, neglects his muscular de-
velopment, and Invariably tumbles into
his train, or mounts his street Car rather
brisk walk or a half hour in the gym
nasium. The popularity of the bicycle
has tended to counteract the disuse of
muscles engendered in a large proper
ton of town residents; but there are
still numbers of persons of both sexes
who require vigorous muscular exer-
else in order to maintain health. Women
are the victims of modern social and
m q oh onc p1Y ocsf ~ 70
as much as men. The Capitalization
OF many domestic Industries may have
improved the character of the products
thus manufactured or of the work
performed; but when bread was made,
and washing was done at home, the
female members of many families fair
~ well off, but not too richly endowed
with this worlds goods, were probably
employed in kneading the dough and
ironing the linen. One Of the results
of this general Discrimination to take the
amount Of exercise essential to health
is the revival Of practice which is
recorded in the earliest medical papy-
rus in the British Museum. The in
deduction of massage nay be regarded
as specific evidence of the tendency in
these latter days to the neglect Of
muscular exercise; and DR.. Eccles holds
that if it be true that the allegiance
of function in certain glands is pro-
ductive of diseases which can be cured
by the injection of organic liquids de-
rived from a similar source-and mod
ern research has established this be-
lief-much more is it evidently true
that the failure to employ the great
bulk Of muscular tissue, which is 50
large portion Of the human frame,
will, and invariably does, give rise to
disordered function and altered struc-
turc in the other organs and tissues of
the body, which are intert1ependent
on the activity OF the muscles and
each other Mental and nervous over
strain are rarely ASSOCIATED from mus
cular disuse and facidity. The burden
OF Dr. Eccles' e4hortation is: Even
If you make a little less money, take
more exercise. You will save the diff
ference in doctors bills, and bring more
happiness not only into your own life,
but into other peoples" ,-ls
Improving the Circulation in Marine
Boilers.
Many different methods have been
tried during the past few years for in
crtasjng the circulation in marine boil
ers One Of the most recent takes
the form of u sort Of injector inside
the boiler. The feed-water issues
through this injector, and so induces
currents and the mingled feed and boil
or water is distributed by small pipes
to suitable parts OF the boiler. A new
cruiser in the French navy has been
fitted with novel form of circulating
apparatus. 1t consists Of a special
pump, which draws water from the
level Of the furnace tops, and delivers
it at the very bottom Of the boiler,
where it is forced in, thus effect,lally
insuring Il change in the position of the
water. The efficiency of the heating
surfaces at the lower parts Of the
furnace is thus very materially in
creased. An important order has been
issued by the French naval 'authori-
ties, insisting upon the necessity of CIV
ing boilers as, much care when not in
use as when under steam The boil
ers on board all ships in the reserve,
as well as on those which are laid up,
are to be filled with fresh water; and
this is to apply to shell boilers, as well
as to those Of tubulous or pipe type.
In the case of large boilers with large
tubes, there Is to be added to the water
a certain amount of milk Of lime, for
the preservation of the tubes, or a solu-
ton of soda may be used instead. This
solution will not be so strong in the
case of tubulous boilers with small
tubes as in those of the larger tubes,
so that any danger of contracting the
effective area by deposit from the
solution may be avoided. The strength
of the solution is to be just sufficient
to neutralize any acidity of the water.
The outside of steel or iron tubes in
boilers which are not to be used for
long periods are to be protected by a
coating Of red lead or coal tar as far
as it is possible to reach. For those
places which are inaccessible protect
I've coating will be obtained by burn
ing under the tubes certain amount
of tar or coal tar, whose smoke will
form a coating of soot and thus pre-
vent the air from reaching the surface
Of the tubes In addition, the boiler
casing is to be cleaned and kept air.
tight after placing inside some quick
lime. Finally, periodical inspection of