The sun. [volume] (New York [N.Y.]) 1833-1916, 1897-09-19
VOTES ON sC1ENCE AND INDUSTRY.

pany mas lately introduced with much Subtraction 70
thetraNeiling pubic on that important route, y new
description OF sleeping car. These cars wero built at
"oNerhampton from designs by A Ozark, the well
kno"n expert In TINS oranoh, each car being seventy
rect long and having six'wheel trucks. and the end
platforms are described as being completely Enclosed.
eo~ o prevent the uraughtinoss OF side doors-in
otner words presumably the usual American vesti'
puIes' Thcre are corridors the whole length OF tho
car on one aide and eleven cabins" or compartments,
SIX containing double berths and nve single; only
TWO OF these cabins have upper berths. while in all OF
them except one tho beds arc placed so that the occu.
pant les crosswise OF the car. Tho smoking compar:.
Tnent Ia In the middle OF the car. and lavatories are
I. in sres, variety -, ,,ri. .nS ro.,".,o, .s.a1n"s
man,e I,s,,sn yv,,nr, snd o,h.. -"
:, - ,,o oowh,r.,,on p.anaoa...
,,n0p,sh nj, "a. IA, a. .nr ill.,. h. m.s,.a, -,
o,,h. ~
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extremely satisfactory results from nHnF with coal
aust, according to the Cornelius system OF operating,
continue to be reported from Berlin. though without
designating the particular establishments. The coal
dust used In the process 10 contained in q hopper. the
necessary quantity being fed out by means Of q
toothed measuring wheel. and, a. Il drops out OF the
hopper the dust encounters q current of air produced
oy a ran and Is sucked into q tube which conveys II 20
inc furnace; the latter, lined with nrobrfck. is OF fun.
mel shape In section. Tho mixture OF air and fuel en-.
ters near the bottom or the funnel and bursts into
name when IL passes upward In q vertical direction
ana meets the red'hot nrebrckh. At the upper part
OF the furnace chamber fs q nreorick arcn to break
up tile name before 1t reaches tho boiler nues. The
oriose IL placed a considerable distance behind the
arch, aud owing TO the dimensions of the nre cham.
Der and the bottom MUGS the draught 10 chocked-the
enect OF this being. II Ia asserted, that tho ash Ia de.
posted In front OF the bridge and the melted clinker
runs back to the lowest part OF the funnel. shaped
furnace chamber. whence II may from time to time
be Withdrawn. An ordinary boiler furnace provided
with bars, but capable OF being shut on with q dam.
ss.,,... 49,, - w 'no
ars, '
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The comparative durability OF different flooring
materials is set forth in an article in the Scientific
American based upon careful and accurate i~nvestiga.
lions. In these tests an ordinary iron rubbing wheel
was used. like that employed by stone workers for
rubbing n smooth face on marble or sandstone. and
the samples TO be tested to blocks OF sandstone.
laid face downward on the rubber wheel. which re-
volyed ut the ratio OF seventy.nvo revolutions q min.
ute. being supplied with sharp sand and water. Tho
blocks to which the noorings were cemented were of
equal weight. so that the rubbing was erected under
nearly the same pressure in all cases. Curiously
enough. the material which resisted best this severe
trial was India rubber thing. which, after an hours
rubbing. lost only one-sixty. fourth of an inch OF its
thickness; and. next to this. Engliah encaustic tile
gave the best results. losing only one-eighth Of an
inch in IN hours treatment. The artificial stone
known as "granolithic" was third. losing three.
eighths OF an inch; while North River bluestone lost
ninesixteenths OF an inch. All the marbles wore
away very rapidly; q piece Of marble mosaic disap-
peared entirely In thirty.nve minutes, while solid
q, an bonr Mo-, ., ~. 800 roo-nn. ~ ~Na
s,on halter ,h., rho u,-,,.. ,,r. ri. ,,,. ,.....,-
exens,,t.ortb y, an ,n,h 80, ,,..,n... 49,
moved p.ar,x tw,cs "a rucb ,,or ,o,,d ,,.,,,.. -,
either OF the n,ne.L
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inSehiouS metnoo mas oeeh devised oy Col
~ II SELL san ftahcisco. Tor the enective restora'
uon OF smoo'h'oore cannon. this Invention. a
claimed. securing the necessary rotary twist in th'
AT "''"ou' u 'rouoioo peinB hreo from 4 rinec
gun VI ' NO iao'li'y u tumohns, In shape
inc ueSice TOT accomplishing this purpose Is that Of
= III eonlco' sho'' n II us pore Is q hollow
.apAo' Vi h'iu'hs "eohs'oerAo'e quanuty OF slow
burning po"uer' q pius screws into this hollow
no'a'ns me powder securely within Around thu
easss TINS pug are q seriea OF grooves leading Int
tne po~uere na"oer' ana oored ~ an angle opposite
twist, and thus bores its way through the air, DOM
this on the same principle that makes the .piu
wheel revolve when It IL lighted. A charge Of quick
burning powder is dropped into the smooth-bore can
non. and the proJectile is pushed In upon II the fus,
is attached and the cannon nred-the quick. burning
powder e1palling the proJectile and lighting tn
slow burning powder through the grooves This be
gins to act at once. accelerating the speed and initial
ing the twist even before leaving the cannon. Tn
speed is said TO actually increase while the ~proJectil
is in the air. and until the powder Is burned out tn
rotary motion continues to accelerate the ball.
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on' " u hoe feeeh' in'eh'ohs mehtione'
""'uS 'nose piousn' iof"A'u III germany Is on
den, viz. . kind OF heatAble shoe. and the means b.
which this quality is insured is claimed to be easil
practicable. Within the heel OF the shoe, which
adequately followed out for the purpose. there ID
receptacle for a glowing substance similar to tina
which is used In the well. known Japanese han
warmers. Between the soles, imbedded in asbesto
covers, there is placed Q rubber bag which Is lille
with water, the latter being heated above the hee
and as II circulates while the weArer OF the shoe
walking IL keeps the entire neither surface Of the foe
. warm; q small safety valve is provided. so that th