The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-01-24
SCIENCE AND INDUSTRY.

hitherto unattnined. The novel and conspio.
uous feature In this case consists In the simple
management OF n pair Of rolls rotating In
horizontal plane on vertical shafts. these rolls
being journallcd ia such contleuity to the hori-
zontal rolls that thor peripheres all turn in
to form the transverse outline OF an beam.
In this system tho horizontally rotating rolls
form the top and bottom faces Of the l. while
tho web faces are formed by the
horizontal rolls; tho housings Of the
horizontally rotating rolls nre also ar
rSnged i9r lateral adinstment being moySS,,s
arrangement ~ said " be most satisfactorily
me ""a Of es Se"H tss ye ss
ing perfect concurrence II action at acommon
point Of compression, and s s the en- sn.
method completely oysrcomss ths dItilfulty q
large size. by ordinary rolling mills.
A London journal speaks favorably OF what
is termed the latest addition to the many prod
ucts obtained from coal tar. an article do
scrlbed as possessing ali the desirable proper
ties OF India rubber. method has been dis
covered bya German chemist. It appears By
which. after the tar has been refined by means
ofsulphuric acid. tho rcsidum can BIO worked up
by simple manipulation into black mass boar
ing In appearance very close resem blance to
| ordinary asphalt. but at tho same timo hav-
ing tho ell-known characteristic Of elasticity
initted to continuous and Intense host tie ma
torial, 1t s said. can be decreased In bulk some
oi go ner sSn o
ss tin stG fS r o5
comes in , waterproof Xarnish. suitable for
forming durable ana reliable covering e.
In recent paper on STEEL read 10y DR.. Ander.
con before the Iron Institute England. he 10
| reported as saying that when piece OF solid
iron is thrown into a pot OF molten iron or
| steel. tho solid metal at first sinks. which
shows that its volume is less than the melted
substance. but soon the solid piece becomes
| heated. which causes it to expand. its volume
is increased. and 1t rises and floats on the sur.
face of the molten mass The action is re-
marked as being the same beth with
aSn on Simply pqee 81 into
se wasa 1t ian m s be- be
iron in falling that height. but: as a matter q
fact. the iron. II placed upon fork and lowered
Without any such impetus. would go down: In
the course Of q few seconds. however 1t comes
up again. and keeps On expanding DIM until the
The surface Of the metal: when It decreases in
volume. and. Of course. becomes OF the seme
Bya now process now being introduced the
coloring Of sieepskins for rugs. &C.. has been
much simpliled. while at tho same time the
appearance is said to be considerably Inn
proved beyond the ordinary article. Accord.
ing to this method tho skins. after being tam
ned in the usual manner. arc we'll wstered
and nailed fiat on board Of corresponds
ing size. with flesh side downward. A bath
a rs m ths up oN Mah Wiz ts 1 tbe skin
Toof hangs downWard: the beck is then grad.
ssS III Sys S Il
and dried i skins a
up, upon which may float the boards. the latter
to be we'll dried to prevent warning. -
Another ingenious mechanism has been add
ed to tho vast number evolved in railroad
economics-in the present instance new kind
OF clock. the peculiar capabilities Of which u
is thought present special advantages to loco-
motive engineers. The dial plate and figures
are Of large size. as are also both the hour and
in
M band E Mhs a5 fe fS e
flashes into the dial: five minutes later the rcd
sna in
next train following can thus tel! exactly how
when the train passes drops the signal Light.
Successful tests have lately been made with
a new attachment for carding engines an Ar
rangement designed for the stopping OF th0
machine The shaft in the upper calender
roller is in this instance prolonged q little be-
yond Its bearings. and at its end Is afnxed
worm gear into worm wheel. which II
mounted CD a stud attached to O bracket on
the frame. The wheel has pin affixed to
its surface which engages with Lever
the Other 'U end Of this This latter lever being
bent SO as to pass under catch on one SIDE q
HerEns position by the catch THSs eifeet .!
this mechanism is that Il the silver is passed
out d Contact ut WITH SHps the e", whssi
wheel. and thus removes the levers about their
sest centre releases the t catch attached to the
1t appears that very satisfactory results have
been reached in experiments made with N.
Calllette's apparatus for producing q temper.
ature OF from 90 to 40 degrees. F.
below zero. by the expansion Of car
bonic acid. The apparatus consists OF two
concentric vessels with small annular space
between them. spiral coil being placed in-
side the inner vessel. and this is put In COM
%f sss
coil is connected with the annplar space. and
the inner vessel is, iilled with alcohol. the
stop-cock on the carbonic acid vessel Is fully
opened. and the cock on the spiral partially
opened. when the liquid passes slowly into the
coil and takes tho form Of snow. From the
which are placed pieces OF sponge soaked In
alcohol which arrest all the acid that has not
ont OF the nppnratns through bent tube;
In thu inner vessel. and consuming four and
one.half to iiye and one-half p9Hpds OF LIQUID
can be obtained IN a few minutes. IN
writer In a mechanical journal states that,
in the frequent dilemma Of the spiral spring Of
an instrument getting broken. 1t 10 much
more satisfactory to make ono than to send
the instrument away for attention. In maxi
ing them. tho best OF spring steel wire is to be
used selecting smooth iron rod the size Of
the spring to be- made, carefully drawing
tho temper from the metal and fastening the
rod and one end OF the wire In Q beneh wise: