Chicago eagle. [volume] (Chicago, Ill.) 1889-19??, 1901-12-07
[nNr$ciellce7
Ms(fffve1SStion.

BY employing compressed air. Dres-
den manufacturer has lately succeeded
in producing glass vessels of extraordi-
nary size. Heretofore. 1t is said, con-
cave glass could be blown into vessels
having a capacity not exceeding about
90 gallons, but by the new process glass
bath tubs and large glass kettles can
be blown.
The archacologists, who have made
so much progress In recent years In I'M
covering the evidences of ancient civili-
cation. now tell us that the Caliph OF
Bagdad owned and operated a paper
factory before the year 800 A. ID. The
material Is not stated. 1t Is hard to
| believe that the paper was made by
our modern pulp process.
In Western Europe. and particularly
In Germany. the employment OF motors
utilizing gases from blast-furnaccs Is
increasing, 1t Is said that the use oil
these gases. which is not so common I'D
England or the United States. effects
considerable saving In the cost OF foun'
ding. The motors thus driven are EN-
ployed principally for actuating air
compressors and electric generators.
The great comet seen in the southern
hemisphere last May presented some
unusual features. At the Cape of Good
Hope it was observed to have fan.
shaped tail, consisting Of two straight
aud narrow principal streaks and
large, broad. but fainter, appendage to-
ward the south. One report says that
on May GIL, the bright. straight tall
was IA degrees In length. while the
enormous lateral emission Of simmer
ing light flooded the southwest with u
ghostly CLEAN 40 degrees long. U de-
grees to 10 degrees broad, ana the
whole space between this mighty ex-
tension and the more brilliant tail was
filled with a gauzc-llke sheen"
Notwithstanding the popular belief
I'm "equlnoctlal storms" scientific inves-
LEGATIONS fail to show that the passage
Of the sun across "the line" that Is. the
equator, which constitutes the vernal
equinox when the sun Is coming north
and the autumnal equinox when 1t Is
going south. Is accompanied by any dis
tinctive atmospheric disturbance. A
recent study of the periOdicity Of cy-
clonic winds In England. covering the
years from 1874 to 1880 inclusive.
shows, however. an apparent relation
to the eQuinoxes. Tire greatest fire.
qucncy and force of the winds occur
about two weeks before the vernal. or
spring. equinox and three weeks after
the autumn equinox.
A fall Of hail to the average depth
Of one inch over n region four miles
wide and eighteen miles long Is n foil
Of 1G7 $4,000 cubic feet Of Ice weigh.
ing nearly one million tons. The aver.
age elevation from which 1t fell may
be taken as five thousand feet. AL the
mass that fell must previously have
been raised to that level; that IL, one
million tons must have been raised
five thousand feet or five million foo,
tons OF work must have been done
which corresponds TO the work Of al
engine Of n millIOn.hOrse power work
ing for I've hours. When the hall fel
the force Of gravity did this Identical
amount Of work. If we wish to pre-
vent the full Of hail we must somehow
do the same amount Of work per hour
and we must keep up the work at thu
same rate Us long rs necessary. Thu
editor OF the United States Weather Re
view suggests that the spasmOdlc dis
charge Of few small cannon Is mo-
likely to be very effective us u proven
| tive