Evening capital. (Annapolis, Md.) 1884-1910, 1891-06-09


at once
The system Of riveting by hydraulic
power is being successfully applied to the
shell plating of vessels in course Of con-
struction on the Tyne.
An Italian Psychologist of repute, named
Mosso, has demonstrated by experiment
that thinking causes rush of blood to
the brain, which varies with the nature of
the thought.
The Zalinski pneumatic gun has been
tested at Shoeburyness, England, with
marked success. At 1900 yards range
six proiectiles were thrown into a rect
angle "a by II yards in size.-[Scientific
American.
Among the latest disinfectants is
alysol, which appears to be very much
like carbolic acid; the emulsifying agent
is resin or fat soap, tar acid being incor-
porated with the soap at the moment of
saponification.
The first sewing machine was patented
in England in the year 100. One of
these old machines is on exhibition in
England America, however, can claim
the credit of perfecting the sewing ma
chine and making it a commercial sue
cess.
In Prussia it has been recommended to
abolish the use of dnpowder and other
slow explosives in hery mines, but that
dynamite should be used, provided the
proportion of fire damp present does not
surpass the safety limit, as shown by the
safety lamp.
Oxygen is the most abundant of all the
elements; it composes atleast one-third OF
the earth, one-fifth of the atmosphere,
and eight-ninths by weight of all the
water on the globe; 1t is, also, very inn
portant constituent Of all minerals ami
mails, and vegetables.
There is talk in France of utilizing
watercourses as railway motive, power.
1t is proposed that the track shall be laid
on an embankment in the middle of the
current and that the locomotive shall
have two paddle wheels dipping into the
water and revolving by it.
In France a new magic mirror" has
lately been introduced. 1t consists essen
TALLY of glass plate coated with film
of platinum so thin as to be transparent
to light coming through from behind,
while being true mirror or reflector to
light impinging on it from the front.
The average number of American
patents issued yearly is about 10000.
Compared with the number issued in any
other country this is very large. England,
which comes nearest to us, issues. only
about 1900 to 5000 year, and its system
is very much more lax than ours.
A new system of house wiring for cleo
trio lighting consists of fitting the build
ing with continuous tubes of insulating
material, through which the wires are
drawn. The tubes are made of paper
soaked in a hot bath of bitun:inous ma
terial, and are said to be hard, strong, and
tough.
Architects Van Brunt and Howe, of
Kansas City, have designed palace for
electrical exhibit at the Columbian Fair
that will cover over 81 acres of ground
and is to cost $780, 90. The style of archi-
lecture, in harmony with other building
of the great group, win be Italian
Renaissance. The completed structure
will form beautiful monument to the
twin phenomena, electricity and magnet
ism.
Promises of aerial navigation are null
tiplying with such rapidity that all that
is necessary to inspire definite hopes of
seeing within the present generation ae-
rial navies flying through the blue is an
ounce or two of performance. The West
ern flying machine companies have given
us glowing statements of what they are
going to do, but up to date their most inn
posing achievement has been the creation
of immensely capitalized companies on
the expectations of the future Pitts
burg Dispatch.
The Proctor steel tower at the Worlds
Columbian Exposition, says the Engineer
ing Nelcs, is to be 1855 feet in height
and will resemble the Eiffel Tower in
its general appearance. 1t viii be hexag-
onal in plan, instead of square, however.
and will have larger base, and start at
smaller angle with the vertical than
| the Eiffel Tower. The designer of the
tower is David A. Proctor; the architects
are Holabird & Roche, and the engineer
is Corydon T. Purdy, all of Chicago.
The contract for erection has been let TO
the George A. Fuller Company. The
steel, of which 1900 tons will be re-
quired, viii be furnished by Carnegie,
Phipps & Co. The total cost of the tower
Is estimated at 5000, 900.
Most people are probably not aware
that there is one at least of the well
known stars compared to which the
sun is mere pygmy. Sirius, the dog
star, which is also q sun, is believed to
have nearly 5000 times the volume Of
our SUN. Its immense distance, probably
100, ,000, 600 miles, make such measure
ment as is applied to the planets inn
possible. Hence the above estimate is
based on comparison of the light of
Sirius with that received from the sun.
It Is the most brilliant star in the heavens,
being far brighter than the first magni-
tnde, and its light has greenish tingo.
During the winter months the place to
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