The sun. [volume] (New York [N.Y.]) 1833-1916, 1893-10-22
xorrs ON scrrvor AND IsDUsrnt.

the rays which proceed from the cathode OF
|. Geissler are capable OF exciting phospho
rescsnce. and will permeate thin 'metal-i
/. being thus possible. on finding a sheet o
} metal foil thick enough TO be air tight ant
opaque. yet thin enough to bo permeable b,
such discharge. to allow these rays passaR,
, into tho open air by closing an opening in Q
discharge tube with q piece Of such foil. This
It seems, has been realized by means OF an in.
Reniously arranged apparatus and q ham,
mered aluminium plate 0o03 millimetre thick.
and thia plate forms In the apparatus shut
ter or window, which, whio quito impermea-
cathode at distance OF twelve centm etres TO
per citrate II freely. the rays rendorips the air
rounds the window. and is moderately bright
only on its surface. strong odor OF ozone be-
ing at the same time recognizable, sub,
stances capable Of ,phosphorescence II held
near the window shine with their peculiar i
p6enomena Of phosp6orescence cease If a
magnet ia soapplied to the discharge tube asto
wn ind hs ,ns @
| for the cathode rays to penetrate: coal gas Is
more permeable. and 30 Is hydrogen.
A simple and durable construction OF appa-
ratus for heating air by steam is announced
| among recent Inventions. There are u num-
Der OF external pipes within each OF which Is
| an internal pipe OF suitable diameter to allow
| an annular pa ssag Q for steam between each set
OF pipes The external pipes are screwed
into sockets. into which the ends OF the inter-
nal pipes are fixed by expanding. as in fixing
boiler tubes: the sockets on the upper pair OF
| pipes communicate with the sockets at the
ends OF lower pair by screwed union.
socket. is made good by screwing up
nut For supporting the ends OF the pipes
sb to solid to
eSnE made with Right and lett
~ IN N n INN In hnf hn N
sets Of pipes. air passing through the interiors
Of tho inner pipes. and also the spaces around
| with other systems for realizing such n result
this Is declared to possess decided advantages
| The new resistance metal in wire. sheet. or
| casting now being introduced is stated to be
very important contribution to this class OF
material The wire resembles ordinary cop
per wire on the outside. has a pinksh white
tinge at the surface OF fracture. and is very
strong without losing much ductility: the tor
sion twist shows over, eighty twists in six
sesses seventy thousand pounds tensile
strength to tho square inch. and hard drawn
pounds tensile strength. with about forty
twists In six inches. Comb med with these
hs Mts to
per with Temperature co-efflcient OF less
than one-tenth that OF German silver.
One OF tho lost important OF recent inven-
lions in cotton spinning is the metallic draw
ing roll for drawing the fibre OF cotton now
coming into use. The advantages. as repre-
scented by experts. are that these rolls. being
ground down to extreme accuracy in size. in
sure at the start and maintain at ull times
perfect oworking without friction on collars,
while the bite of the roll Is positive. thus re-
curing less weight and less power: again.
the rolls, running on collars without friction
admit OF sufficient space to allow perfect at
tenuation e the silver without injury; and pos.
lick ing UP from electricity and sticky weather
is also overcome entircl y. and the imperfect or
dry rolls because Of lack of oil 10 wholly clint;
mated, Further tho cost OF roll covering: roll
vanishing. DELAYS because of silver breaking
down GEnG Ip AMI vast /;
the quality is much superior.
A writer in Science states that while carrying
on a piece Of work recently which involved the
use Of a common Liebig condenser it was no.
ticed that where the stream OF waste water
fell into the water trough. the bottom of which
was rough. small globules of water were
formed. which darted out on all sides and ran
on the surface OF the water to the sides OF the
trough. eight or ten inches distapt-irequently
rebounding from the aide and starting back.
but soon disappearing. The globules varied
IN s ys,Y from an sstn al an men II
along. they gradually decreased in siZe,until
they d disappeared. while others would disar- |
tss Size sudaeny to about
the original diameter. the globule then con
times two EoSules would run ','oeether. com.
other e nstancss instead a Of combnins they
wonld rebound from each other like rubber
s sns % hiS Pnss y mss
observed one glebule. about an eighth of an
Inc in diameter; which reached the side Of
in size to about one-hnlf Of its original d.
ameter An admirable illustration Of water
Ono OF the largest mills for the production OF
straw paper Is claimed by the town OF Chilli
cothe Ill., two digesters being employed and
the manufacture accomplished by an i'm proved
lime process: the vast machinery oporat-
Ing the plant weighs 1000 tons Tho digest
ers are large iron tubs Of twenty four feet
length. eight feet diameter. eighty tons weight.
and requiring a carload OF lime every week.
The hot liquor cooks the straw to pulp after
which It passes through pipes to a chest on the
lower floor and is then pumped through an
upper aoor then back down n be low to an half
finishing chest whence 1t Is again pumped
the coarse grinder and finishing engine.
t ne fi to the vat near the rollers. whore
to the felt rollers. where it begins to assume
diassnf ever s.ss Of roerS
over over thirteen large drying, rollers heated by
chilled steel. whore the paper is nnished and
trapsferred to tho reel stand. and then passed
to the cutter. where it is cut to any size. In
its initial shape. preparatory to being fed to tho
digester. the straw IL ."t into sma II particle,
Among the recent uIrrnanical constructions
Of note Is a triple pillar saw frame. con-
veniently designed to occupy space not
much wider than m ordinary vertical log
frame. In carrying out this plan the cross
girder which carries the saw frame and the
crank shaft bearings. is in one piece, tho
whole being supported on three turned pillars,
on which. by means OF screws connected by |
suitable gearing. they are raised and lowered
together; In order to limit the distance be-
tween the pil liars as much rs possible. the con-
neeting rod Ia attached to the saw frame that
Is furthest from the crank shaft There is a |
bell crank and fly wheel at each end OF tho
crank shaft. which enable the machine to |
work steadily wi |