The sun. [volume] (New York [N.Y.]) 1833-1916, 1898-07-31
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bored in the soil, and In each 10 planted n piece Of
the hollow piping; on the upper exposed end one OF
the corES IL placed with the quill In the centre run
ming up and down parallel with tho pipe. A small
piece of the white paper IL dipped in the Or-PAlla-
-diun and pushed into the open Quill-twenty or
thirty such detectors being put In position at one
ttme-and, IL . leak exists within, say two ya~ds OF
them, the eject OF the escaping gas will be evident
upon the paper, rendered sensitive by tho reasont.
and It will At once turn black. The effect OF the
action OF the gas upon the detoetcr hrSt placed In
pohition becomes evident before the last ono OF q
row OF twenty IL sot up. Tho gas company OF Client
causes regular tests TO DO made in tuin In all tho
atreots OF tho city, and the loss by leakage 10 said not
TO exceed throe Per cent.
have turned their attention to the production OF
corn oil-an article extracted by pressure from the
germ Of the grain By q method simiiAr TO that used
| in tho Manufacture OF linseed oil, leaving n residuum
not unlike in ia character Tho OIL cake of comnerce.
II seems that In the production Of glucose. Il was n
/ matter of necessity Ar.t 70 extract the germ. this, for
| n long time. involving A waste, An against thia. a
COMPANY now turna ont some sBo barreln of corn
oil per day, Most of tho oil goes 10 ENGLAND FOR
soapmakine. It is shipped In secondhand oil bar.
rels, each OF n weight, when nlled, of 400 pounda,
ratod ut tho sctory at 3 cents per pound. Some Of
the oil IN used In this country principally in mixing
cheap paint and for adulterainR linseed oil. II Is
regarded a. a rapid "drying" oil,
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seems that the greater part OF sicilian sulphur
Is still extracted from the gangue In hlns. the neoes-
sary hoAt being supplied by the sulphur. In some
melted NV .up.rhs,tcd team n , n solution oS cal.
cium chloride. of which the boiling point ia slightly
higher than tho melting point Of sulphur. Tho
propagation 10 extinct the SULPHUR By means OF car
bon disulphide docs not appear TO have become sue
cessful. Tho oopsumption OF SULPHUR an fuel in
kilns is one-tbird or more OF that contained In tho
rock. The rock whom containing less than 10 per
cont. sulphur In not treated. The average of the
sicilian minea Ia said To be about 20 Der cent. the
cost Of treatments about 10 cents, and the value Of
sulphur of the best quality delivered on shipbonrd
in sicilinn ports is not far from SO. The reGenera-
tive furnace for treating the rock IA LARGELY An use.
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A comparatively new and very rapid method OF
transferring bulk wheat from . ship into barses is
described in ChdmbeTTs Journal rs having recently
attracted much notice at the Albert dock. London.
The vessel, which belongs to the London Grain Ele-
vator Company. is fitted with pneumatic machinery
invented by q Mr.. DuckhAm OF MilWall, and, from
the grain ships lower hold. the grain was delivered
Ave tons DER hour. The chief feature Of the appara-
tus ia A cylindrical tank partly exhausted Of air, from
which a number of flexible suction tubes can be car
ried TO any place in the grain ship; on its way from
uhip TO barge. the wheat passea through automatic
I Weighing mnchin00, not being touched by hand at
any stage of tho process. A system similar to this
has for some time been in vogue in Hamburg, stet-
tin. limerick. and n few other plAces. and IL In con-
sidered to be the most perfect method Of unloading
wheat which has yet been devised.
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Investigations described before the London Chemi-
cal Society present some further and interesting facts
concerning the phenomena exhioited by liquid
hydrogen. Prof. Dewar hndS' for instance that its
boiling point is really higher than has been suE-
geSted by theory and tho Worko fother e1permenters
boiling houid Ia eight imes denser than the Ras at
ordinary temperatures, whereas in the case Of liquid
air the vapor 10 only four times heavier. Again, this
remarkable substance Is one hundred times denser
than the ynpor Il IL Giving Of, whereas the density
Of LIQUID oxygen 10 two hundred and hfty-nye times
greater than that OF its vapor; the atomic vol
ume Of nouid hydrogen, at is boiling point,
! 10 1A.S, while that Of oxygen IL 1877. It may
> DO mentioned That the platinum resistance Their
mometer,' when immersed In the liquid hydro.
- gen, Ia cooled to within six platinum degrees Of it,
zero point, 90 that II cooled these few degrees more
az Il can be by means Of the LIQUID boiling under 70
, duced pressure-it must break down, becoming AZ
. infinite conductor with no resistance.
. -
writer In the Gu"mi zeteuno oners q Few usefuI
!. remarks on the manner In which the hne red color Of
certain rubber products may DO maintained. Tht
white Ia DUE In the hrat instance. to French chalk
not pefIooCly Qry, ana winch ID easily removed pJ
wipine with naphtha; the other cause of trouble q
the sulphur, which slowly makes It's appearance OF
the surface after some weeks, and, though the sui
Z phur can be got rid Of by boiling the article in 8 De
cent, eaustic soda, many articles will not stand sucl
treatment. Again, rubbing with cotton waste sosket
IN naphtha Ia mentioned as another resort OF som
value. Goods Of this kind which have 10 be expoae,
in chop windows are improved by being rubbed witt
Rlycertne. soap. chloride Of calcium or other by
g groscopic substances, though this makes them some
II what slippery.
a -
In . recent numbero Of POtOtT. Rsingular calculation
10 presented by ]. A. Renie, 1t would require. *
cording to Mr.. .Renie's figures, the power Of q ten
Q thouSand-horse-powe engine about 1000, 100000
years to lift the earth ono foot in height. and to d
this worn. allowing thirteen pounds of water pc