The Republican. [volume] (Oakland, Md.) 1877-current, 1890-05-17
SCIENCE AND INDUSTRY

"A civil engineer in GERMANY must
study and practice nine years under gov.
eminent supervision before he can make
independent engagements.
"A vegetable flannel is made !, Ger.
many of fine leaves which are woven
into undergarments and clothing OF
various kinds. One great ADVANTAGE is
no vermin will lodge in clothes made
from the material.
The art of making red glass for
church windows, as practiced in the
twelfth and thirteenth centuries was
lost for long time and was onl v ro-
covered in 1926. The modern product is
still inferior to the ancient.
The mollusks that bore into the in
sulation of submarine cables arc pro-
nounced to be species of teredo. The
embryo is said to penetrate between the
iron wires of the sheathing and Turk in
the jute until strong enough to cut
through the gutta-percha.
Manufacturing statistics show that
the State of New York leads in tho
production of underwear, while Penn
sylvania is far ahead in the making OF
stockings. Seamless stockings are made
everywhere, but in the Western States
especially; in tho latter are also made
wooden gloves and mittens in vast
quantities, particularly the filled nit
tens, now so important in the trade.
Experiments have demonstrated
that the relation between the yelocty
of projectile and the resistance SsTsd
by the air to its motion diffrs ma
terially from Newton's theory that tie
resistance is proportional to she squar,
of the velocity. For velcities which
are nearly equal to that o sound In the
air the proportionate ircrease OF the
resistance is much greaer than that Of
the velocity.
"A firm at Bolivar N. Y, is engaged
in manufacturing gas from crude oil.
1t is claimed it beatsold nature. Under
the new device the gas can be sent to
any reasonable distance required. The
owners claim theycan show more fire
for heating purposts than any other gas
than any on record or, in fact, as cheap
as natural gas For portable gas
work for hotels at watering places it is
said it can not be beaten.
Flexible metallic tubing is now
made in Belgian, and is said to be
meeting with considerable favor as a
rival of rubber hose. 1t is formed by
wrapping strips of brass or other metal
spirally around a mandrel, the strips
being bent over at both sides and thin
narrow rubber band inserted to prevent
leakage. The tubes bend readily in any
direction, and are perfectly tight, very
strong, and easily handled and repaired
The substitution of steam for com
pressed air in gun intended to throw
shells containing dynamite or other higf
explosives, is proposed in France the ad
vantages claimed being the furnishing
of power direct from the boiler without
the use Of air-compressing machinery
The pressures usually carried in stean
boilers would not be sufficient for this
purpose, but boilers are promised ola
special type which will supply steam t
pressure at from six hundred to eigt
hundred pounds, and which will at ne
same time be safe and easily HANDLED
"A factory at Cronly, si1fvgostsar
Wilmington, N. c., is making bagging
for cotton made from pine needles 1t
is believed that this new material for
bagging will not only break up the jute
trust, but become a source of great
wealth to the SOUTH Dry pine needles,
or straw" as they are termed, serve as
well as green ones, but on account Of the
difficulty of obtaining them in sufi-
GENTLY clean state the practice is to
take the leaves fresh from the trees,
selecting the lower and older ones and
leaving the younger for the support Of
the tree.