The sun. [volume] (New York [N.Y.]) 1833-1916, 1897-10-03
VOTES ON SCIENCE AVID INDUSTRY.

Whlch during the diBsOlving no adds TO the go
luton of potassium cyanide a certain amount
OF cyanide Of mercury, the best results being
obtained when the solvcnt contains O.O5 per
cent. of potassium cyanide and o.025 per cent.
cyanide of mercury. This mixture OF the cy.
andes. it is claimed, operates more speedily
than the simple potassium cyanide. For tho
recovery Of the gold from this solution tho pro.
cess is an clectrolytic one. Tho gold and the
mercury are deposited together upon amalga.
mated copper plates, the nmalgam 80 deposited
is scrapcd Oft, and the gold recovered by dis.
filling off the mercury in the usual way. Tho
anodo is not allowed to dip in the cyanide solu-
ton, but Is placed in a separate compartment
and surrounded with a solution of an alkaline
salt, and In this way the cyanide docs not be-
come decomposed. The eleetr2-motiye force
or the current need not be more than half n volt,
and the current density on the dcpositing sur
face may be rs low as O.06 ampere per square
foot.
Tho driving of light carriages by means OF
hquehed carbonic acid as a motive power has
been often proposed. the difficulty chiefly en-
countercd being the great absorption of heat,
and consequently loss of efficiency through the
refrigeration OF the engine, as the liquid ex-
pands and returns to the gaseous state. The
latest method brought forward for avoiding
this difficulty Is due to the ingenuity OF a French
inventor, NJ. Rassimier, his method being to
p'''' ,ho caroohic acio lhrouRn capiiar! Iuoes
in a chamber heated to 2is degrees f. by pc
troleum or coal briquettes, the heated gas be-
ing then admitted to the engine cylinder, where
IT acts upon the piston. and is then led into n
chamber or jacket surrounding the liquefed gas.
to change the liquid acid to the gaseous form
Ss I, tSpaIIy SeSo H., a. ISn Az ~ 20 sn y, y, tts
gas takes place from the jaclet or chambcr
Inc statement Is, in substance, that the cnpil-
wnss Wills tho ndS1n io M - rs y e q - pa ihrnuo ~ Inc the
heating OF tho reservoir BY tho exhaust gas
takes place only when the engine is working.
-
Tho var;ous e1ner;,,on,s noJo Will, coll - on.
- - ~ nN nlao "iln 'o"' ~
gihes by the French In Algeria. where the sun
hoon ,,,onaos in -. .as,.sa.. Len 49,
- n, 'one ~ 49,
SUCCESS. Inc pesI apparatus Is s'ateu 10 Do
a simple arrangement Of boiler and concave
mirror. the steam generated beinp condensed
- nn,,ss ..%o 80. oo'.s pn.nss"
IN u codeu tuoe surrounded oy water. TINS being
intended for distillinR water merely. But in
India an inventor named Albania bas coptrivod
s spn ar moTnrnles Sy w nne n more tSos varied is x Iesniis q
termed n COOKING boy. made Of wood and lined
being n small copper boiler. covered with glass
r';r renain sme hepI 9, .hg raSs "onfeh.rateu Dy
sort OF food NAV be quickly cooked tho result be-.
Ing a stew or boil II the steam is retained, or il
ano"eu 10 escape u Is a oake; me hSat wltn
increasing the din mater NJ the hoy
-
The committee of the American Boilermakers
Associotiop on s,ord,rd onooieoot;ons rooor,-
"N vi anuai speeinea'iohs reconi
between shell steel and fango steel. Accord.
inc IN this ncv, ruIe sbc,, stcel mot oxnosod IN
, ~ I'm n.' t" = .ui. re-. sne!. see'l not eaposeu 10
ton may have from ca. 600 to 20. 600 pounds
tc,s,Ie s,rongth With nm oIos,i. Iir,it - h,1,
,e''i. e'e"s'n' WIN "n e.a9',o III. vi naii
It's ultimate strength; shell plates which are
exposed to the fire or gases of consumption or
on vb;ob n Aor,inr ia Ia ho dono 70 h.ro
with an elastic limit half the ultimate strength:
plates Tor hre boxes. such as are ex tosed to the
aroatcr nortion If their ncr;rherS IN baue
5000 to 81. 900 pounds tensile strength,
WIN an SiastiS nmit nan the ulllmate sirenkth.
any distinction In rcspect 70 thicIness and
makes the clongation - per cent. for shell plates
OF the highest tensile strength above given. ~
And 40 nor cent for trn how and ranSe nlates-
ali on eight inches. For rivcts the use is rec.
iron or n soft mild stec, having the sans nhvsi
nal and chemical proncrtics a. The irebox bates
The name of Eureka gas is given to a new
ai IN snp'H =, va a.e.! CIV in.s
gas, 90 "eserioeu Va i'reH.'on' ana originated
by NJ. Hector de Favi of Montetasconc, Italy.
il obtained as follows: Lime rs pure a. possible
g.. onan,nrad = hao. oara,hopn - nsrainn,
Is emp'o!eo as u oasc' coiolhohy ana caicium
carbide being added 900 parts OF the mixture
ready for Use consisting of 900 Of quicklime,
SO OF Colophony and so of calcium carbide
by mixing with air: no heating OF water and no
SPECIAL burner Is needed: one thousand parts
sure OF thirtv.8yc mIllimetrcs Of water. and
the p~hotometric intensity of the flame is stated
10 DC ~ candle hours, wnlio me same amount
only eighteen candle hours. Thus in Is as.
serted. the new gas is 80 per cent. cheaper
than acetylenc, or that at equal cost 1t Will CIV
A"'' 40 1e iA''' So.
p,Ioo,u .Lr, !. ,,rou
,,nt nv, NJ v,odiyos,ock nror,inon, pnss,ar
800 pnd -. ,o.aninus - - SIhanion $50
poI' II Il mn" VI Il "loeFi"n i'a''""s'
but where for over four months the port is
blocked up with ice, rendering shippinr traf,c
in,nossihIo Eor m.,r 900 ,ha -. .m
lmpoSsioie. ror man! years the RUSSIAN au'
thorities have been endeavoring to overcome
these natural difficulties. and some time ago
zoo h-oorinn shjns ,.oro ,rtraaunod w. 80
l ths ;ns MP n ~ 10, hnv~nror IT., - mt =
open ~ ne; VI pperation' np"S'cl, "hicn MAJ
p bot "a p rsrtaip sns i Se.es has a n, nrd mow dePopIen
tna, e t.a ehSansot q lmolpsSu a pian
LOT feG i enc m1isoMes9 pari o me lartat