The sun., 1893-01-08


bination. have lately been the subject Of ex-
animation and discussion before the Amster-
dam Royal Academy OF Sciences. These
specimens were the result OF experiments
carried on by a chemist OF LIeGe. Belgium.
and were exhibited as proofs that by repeat
ed reduction to powder and subiection TO
ioys isf having propeetss t quit quite ~ remarEabie and
unlike those OF alloys which are produced by
the ordinary METHODS OF fusion. In the case
dish color. formed by compressing a mixture
ot nine parts OF copper and one OF zine:
Of seven parts OF copper, and three parts
III q zinc rSaasE ESs OF pale e,Sw soIfS soI9r
R in texture % than % eommoH % brass, thee the Other TWAS was
harder and brittle Both specimens had been
filed up twice. and again consolidated BY
pressure. though the union was not complete.
and both Of the alloys contained great auanti-
ties of YELLOW mixture, with particles OF copper
made that though there was evidence OF flow
In the yellow mixture and the zinc there was
nothing to indicate truly liquid state OF the
alloy or OF Its copper.
One OF the railways Of Peru. the Oroya. has
for n long time been successfully operated by
the use OF n residuum petroleum oil having q
fire test Of some three hundred degrees. Fab
In the construction OF tho locomotives for this
line the bottom. back. and a portion OF the
sides OF the flrobox are lined with brick. and
the oil comes through q one and one-fourth-
inch pipe to the bottom Of the front OF the fire.
box. and is then SPRAYED Into the space within
II i ssfn n n pn nnS
white hot retort. in which the air and vapor.
The requisite supply OF steam. oil. and air
can be regulated at will. In firing up prepara-
is used. although wood can be resorted to In
case Of necessity. The burner employed is 9t
pS asa d.rs Of sns s
complicated apparatus generally In vogue.
The common objection TO- petroleum firing.
coal. does not seem to be veriied-six months
service Of n locomotive on this road showing
no sign OF fre.box leakage. and no straining
A furnace for the destruction OF the towns
refuse is In operation Mt Oldham. England.
which burns Mt a temperature OF over two hou-
sand degrees. Fab. and this prodigious heat.
when applied to raising steam. is said to rem
der sufficient power available to more than re-
pay the cost OF collection and burning. The
cells OF tho destructor are each just over i've
feet wide. and ono OF the most I'm portant fea-
lures is a Jet of stea IN which forces air into
the closed ashnit 6y means Of surface friction
Another special % feature is the arranrement E e oi
flues and fue openings. thcse being placed in
the front Of the reverrheratory I r @ furnace arch:
given Off by tho drying refuse at the back
have to PASS over tho hottest part OF
perature. and throug small !apertures In
a rod-hot reverheratory arch. before they can
e oes i
de5nsstf; ri, The . iSrnsos i ,pFEastc9ly - sur.
longitudinal trough or hopner is ct THO back.
being brought down to the crate bars. and tho
openinE at the back is of tho full width and
height OF the furnace: the grdte surface proper
10 DS feet In each cell Tho refuse ia
gradually moved forward by II wnvo-liko mo-
ton wG And the @rn OF elnser FL
continual admission of cold air to the furnace
is by this arrangement completely avoided
A notable instance OF tho modern relegation
to tho past Of some long established scientific
theories is furnished in a raper read bv the
artist Prang. before one OF the Boston institu-
tons Of art. on the science OF colors. Thus. in
regard to tho commonly accepted rule that
blue and yellow lights produce not green but
white. it is shown by tho Maxwell rotary disk
that this assumption. though truo OF expert
ments with certain particular blue and yell
low. does not apply TO u combination OF tho
ideal blue and the idea! yellow. Employing
yellow. and for his ideal yellow ono that was
free from both blue and red. Mr. Prang clair
to demonstrate that tho usual mistake has
arisen from too loose Il use Of the terms blue
and yellow: these. as is wei! known. being
names that are .indiscriminate!y borne by q
great variety Of impure hu"s. by tho use OF
tho typical red. yellow. and bino do. in
the supposed imnossitlity oi this result here:
tofore being due. It is assorted. 10 the use OF
impure colors.. Tho claim that yellow and
blue are not primaries. because yellow can be
obtained by the mixture OF rod and green. and
blu" BY the miYture9 Of green and violet Is
accepted inference from these facts is declared
to be wrong.
The smelling OF iron sands. in those regions
whore such material abounds. has lately at
trncted no little interest. and California pa-
pers publish an account OF the charging Of a
blast furnace Mt Onehunga with the iron sand
in the shape of bricks" instead OF with iron
ore: u tapping took place. and the result was
that several tons OF orc wero obtained from the
furnace, the metal being pronounced to be
workable iron of first class quality,a por-
tion OF tho molten metal being converted into
small cast ings. showi ng comp etc adaptability.
The bricks" with which the furnace was thus
| charged were an adm xturo of iron sand and
clay and were manufactured some sixteen
| years ago. 1t is claimed that the yield of iron
| bricks. and it is believed that iron Of n high
| class may be In this may economically pro-
duced-tne development OF an important IN
| dustry. in fact. being probable. as tho west
| coast abounds with incNhaustiblo quantities
OF raw material in deposits OF iron sand.
Mention is made in tho technical papers Of
| the Introduction OF nm ingenious autsmatic
drop feed lubrcator. which. while supplying a
number OF bearings automatically with lubri-
| cant. allows OF tho amount received by each
being minutely regulated. 1t consists OF. a
tank containing the supply OF oil and fur
nished with n number OF outlets at the bot
tom. which are connected to the several bear
ings by pipes. A horizontal cylindrical plug
is contained in bored recess on the lower
part OF tho oil tank. anu one end passing
through wit6 G26 in rssbes 9af side @b.s Of
aEeratsd by pawl o,hes in The usual ,si, manner
OF damctrically arranged holes which pass
nearly through tho body OF the plug and
screwed plugs provided with screwdrlver
stop by screwing these small plugs up or
down the depth Of the several oil receptacles 8
in tho main plug can be adjusted with great
accuracy. The oil flows into these cavities
when they are uppermost. but with the rota-
tion Of the main plug containing them they
are inverted. their contents are discharged.
each into tho outlet to which they pertain. A
branch supplementary pipe Is fitted to each