New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1856-05-27

1hi, powder IS mixed with small pieces OF ch!oruet
of sodiun heated in Theoretically sealed tube under
the blow pipe until decompOsed. When the tube was
broken it was found to contain great number vi
eobules Of aluminium scattered over everything the
metal having about the same specific gravity a. the
mixture dtcsmpoecd. Another process Is required to
unite these globules. Ii might be supposed that
aud longer continued heat would effect this; but the
fuorc acid would decompose the glass OF the tube
So the materials above named were again mixed
placed in platinum crucible coated with magnesia
and the crucible with sealed cover submitted to rof
heat under the blow pipe for half hour cooled aud
the product broken up and washed. In this way two
large ard multitude Of sHall Jumps Of aluminium were
obtained. Experiments with iron crusbles have not
succeeded. zinccOored layer IS deposited on the
iron surface Porcelain cruciblts cannot be used I'd
the Auoric ncd DESTROYS them. The problem IS now
TO discover a cheap method OF reducing the metal.
Wha, would not the alcbcmists have given had they
succte aed in extracting from clay meta resembling
silver
A NV Phso.-A new projection in the mechanical
sgenci,s Of the Piano Forte il beginning 10 excite
attention amorg musicians. Mr.. 5. Is Ddgge, Of
Detroit .s the inventor. Tie essential difference be-
tween this AID other piano fortes is as f,llovs:
l. The is but half inch thick instead OF three
or four times that thickness, IS is usual .. Toe
strength oithis piano derived from Light upper aud
lower iron frame ana not from blocks Of woodland
hence the interior il left free for vibration. 3. The
sound board is not glued down but is fixed to deli
cate ron frame and Is arched Ike violin belly. There
j. q soundo-t connecting the upper and oFer sound
Ing -loarda. 4. The springs pass over metallic sal
de- and henc, are not dep, ndent On wood, which
4lirks and expands, for holding in tune. These are
the main nov tes IN this piano. The proper way to
st the cIceltnc of the tone Of such piano IL 70 do
a. old the Committee of the New-York Crystal Pal
ace-plsce the pianos sde by side, and then test LIST,
quality OF tone 3D. equality Of tone; Sd, touch; 18th.
t,naclty of tone 5th durability OF workm ,n.b p-the
pisnos having been previously locked up and sealed
6r several weeks. Under this test Erards grand
pianos were pronouncedthe finest in the world barring
her inability 10 hold in tune. Now, with Erard
alongside OF NJ. Drlsgss-alowance, Of courss, be-
il : made for TIE being & grand and sle other
-quarc piauo-an irreversibe Judgment can be formed
OF en- instrument which claims to rcTerse many Of the
present roiions Of IT,. mechanism. Of pianoorte. As
several millions Of dollars annually expended on
American paros-not counting what i paid for icr-
ign un,,--uch a test i worth tryirg.
While on til. sbtj q we may add notice Of al in
Of the sounding board; but it 70 Us that the
American -uyer,ede. all such partial matters:
" Que Of tue greatest npro yements in the con-
struc;oI OF paIotorez has been the Efficient support
# Il souuuiIg board sithout importing it, power.
Of vibration Being ergs thin piece Of wood. il il
ptculsry liab, 10 b. acted upon by the weather:
morroy-F, tie bridge, over which t5e striugs are
.tiBuod, exercises an enormous pressure, requiring
adequate t,sthnce to prevent starting. BIT every
.nctayor TO support the scuudingJoiTs 1yainst thu
Ir,.sur,, ana 10 keep hat IN al Weather, have
Lit4ero interf,ied With IT. yibiatO.y power, aad III
iUI.d tl tore s-d touch Of the in-irument. IL has
ben r-.rved for Mr.. Dreaper OF Liverpool 70 over
cone tie difficulty. and 70 discover means Of s-p-
poTtrg and Tegu atIng every polioc Of the -0uH'ng
boar, II sUeh maIECr u 4re"ty TO Dcrease III W.
bIatory power and, III cors.Gucpce, 10 improve tie
tCnc tuOu gh ut and to obtain Other cprrelatiye 80
yaitacer. He ha- taken OUt patent ~! II, and We
lave doubt b. viii reap from liz discovery ~ reat
hcn H. pfcuniary a. he hi- conferred On the lJysr'
VI music % BIZ improvement, Of that sJul If private
harmony 'te pDero-im''. Like m5r real improve