The Van Buren press., 1894-03-24
SCIENCE AND INDUSTRY.

Trade returns OF Russia for the hrse
nine months of last year, compared
with those of the corresponding pef,oa
of 1892. show an increase to the value
of 95. 694, 900 rubles In exports ana a.
oss, 900 in imports. ~
In the colony Of Natal tea contin-
ues to be largely grown in the coas.
districts, chiefly in Victoria county anu
the lower Umzimkulu division. Inc
area under cultivation may be pun
down at about 2,20O acres. -.
Official tests of different qualities
of steel at the Massachusetts, arsenal
show, contrary to the popular OPINION
that steel is stronger at zero Fahreh-
heit than at ordinary temperatures.
The minimum of strength is at ABOUT
BOO, but above that it rises again I'LL
IL reaches its maximum at $500.
The first printers union OF which
there is any authentic record was
formed in London in $780, its oeJect
being, as the charter states, TO cor
rect Irregularities and to bring the
modes of charge from custom ana
precedent into one point OF view IN
order to their being better understood
by oil concerned.
The average duration OF human
life is about thirty-three years. one
quarter of the people on the earth die
before age six, one-half before age Blk.
teen, and only about one person OF
each one hundred born lives to age
sixty-five. The deaths are calculated
at sixty-seven per minute, 1890 per
day and 81, $3.50, ss5 per year; and births
at seventy per minute, l0O,soo per day
and 36, 792, 900 per year.
Statistics regarding the tides in
the Bay of Fundy are so startling US to
seem almost incredible. At Grand
Manan the fall is from twelve to fif-
teen feet, at Lubec and PASSPORT
twenty feet. at st. John from twenty
four to thirty feet, at Moncton on the
bend of the Peticodiac. seventy feet,
while the distance between high and
low-water mark on the Cobequid river
is twelve miles the river actually be-
ing twelve miles longer at high than
at low water.
in the ordinary respiration OF man
sixteen or seventeen cubic inches OF
atmospheric air pass into the lungs
twenty times minute, or a cubic foot
every 81 minutes; s74 cubic feet In
twenty-four hours. The lungs hold $50
cubic feet At each respiration 1.375
of oxygen is converted into carbonic
acid gas. The nitrogen inspired and
expired is exactly equal. During the
act of inspiration the lungs have been
found to be the coolest parts OF the
body.
I'm children of consumptive parents
number of deep Inspirations, accom-
panied by horizontal extension OF the
outstretched arms at each inspiration
distends every part of the lungs and
expands especially the apices where
this insidious disease first appears. In
cases OF contracted lung from pleurisy
such exercise will break up old adhe-
sions and restore lost breathing power.
This pulmonary gymnastic exercise in
moderation should be practiced by all
persons of consumptive parents Pop
ular Health Magazine.
The total heat of combustion of
one pound OF hydrogen is so, O3s units,
and of one pound OF carbon IA. 500 units.
1t requires 1874 units of heat to con-
vert water at temperature OF zero to
steam of one hundred pounds pressure,
but as steam is generally generated
from water averaging about sixty de-
grees, the total heat required to con-
vert it into steam is only 1884 units,
and one pound Of bituminous coal of
average quality contains heat enough
to convert twelve and one-half pounds
Of water at this temperature into steam
Of one hundred pounds absolute pres
sure.
1T is not always the direct shock of
the lightning stroke that does the
greatest damage. The discharge acts
powerfully by induction on all conduc
tors in its vicinity, producing thou
sands of momentary but intense cur
rents, which when they leap across
minute intervals give rise to sparks
which may start fires or explode gun
powder. One of these induction cur
rents, in leaping from one metallic
thread to another in table cover, set
the table on fire, and in another in
stance the transmitter Of q telephone
was destroyed in the same way by the
fusion of part of the wire In the coil.