New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-09-24
APPLIED SCIENCE.

CLEANING UNDISCOVERED STATUARY IN UAhphN''
&c-It is recommended TO first Kill the Vege'aion
nv the application of petroleum and Denzlne WHlcn
will not inure the stone, anu VI yv;th rag
STRENGTH or PERFORATED IRON PLATKs.-Ac-
cordno 10 experiments by Kirkaldy, the diminutlon
of the strength of iron plates by punching and Dor
ing for rveting is not entirely accounted Tor by the
loss of the metal removed The breaking welgnt
for A unit of surface of the metal remaining was
onnd TO be- on an average 81 per cent less Tor the
punched ones aud % per cent loss for the Dored ones
than for the unpeTforated plates
puospHoRUs STEEI-AmOng the results of ex-
tended experiments conducted by Euverte to ascer-
tain how much phosphorus may be added to steel,
the following seem important: BY bringing suitable
quantities of substances containing phosphorus IL
contact with iron of different kinds-splegeleisen'
for example-treated in q Siemens-Martin furnace,
he found the resulting metal to be malleable, ana
| generally of good quality, and he also determined
that cast-steel may contain certain ano at ~; ~
phosphorus without losing in quality as reSpecls us
tenacty, and that steel containing OOO3 OF phos-
phorus and 0.0Q15 of carbon affords most eAceHenV
| rails.
ELECTRO ToRsIoN.-Mr George Gore has shown
that a rod may be brought under the influence OF
| electric currents in such way as to experience
twist amounting to as much as quarter OF circle
| This twist is always attended by the emission Oh
| sound and is produced by the combined influence
of heaca aud axal currents of electricity, one cur
| rent passing through long copper wire surround
! ing tho bar and the other in an axial direction
| through the bar itself The result is explained as
| due to the combined influence of the magnetism
| induced in the bar by the coil current ana OF the
transverse magnetism induced IN IL py the aNldi
| one. The current flowing from a north TO south
pole produces left-handed torslon reverse one,
right-handed torsOn, C., IN the direction OF an
| ordinary screw.
| CEIIULosE-DYNAMITE.- has succeeded IN
producing a nitro-glycerine powder possessing all
the advantages of acknowledgements and also that
of gun-cotton in its indifference to the action OF
water by employing the property of certain organic
substances discovered by him, of absorbing nitro
elycerine and retaining it completely in water IN
condition perfectly capable of explosion Instead
of nitro-ceulose and guncotton, first used tor the
purpose he employs peculiarly prepared cellulose
which takes up 20 to 20 per cent oil nlrO-gyeeIihe,
| and forms an explosive, which remains constant ~
composition under water, and after pressing out ana
driving acquires its previous explosive force COM
! pletelv, and which, when mixed even with large
amount of water can be exploded with great elect
! by means of Eliminates or cartridges, out not Oy
| merely mechanical means.
| GOLD AND VIOLET BRONZE PowDER.-The process
| for preparing these so-called powders ltungstons
tungstates of an alkali by means of tin and fused
acid tungstates has been sOimproved by Dr. Schniz-
Ter as TO be adapted to the preparation of them In
suitable furnaces by the hundred weight if the de-
mand for them will Justify it, He increased the
amount of tungstic acid to such an extent that by
pulyefizing the mass obtained by the fusion of the
ingredients at high temperature in crucible and
heating it in porcelain tube by weak charcoal
fire il. at most simply became adherent by fusion.
The reduction was then accomplished III a lew hours
| by common burning gas. by moderate temperature
81 10 nd
repeated publication with hot nitric acid and with
calstic soda, appears by sunlight as beautllul
goldyellow,. uniform powder; by higher teInpera,
| ture it acquires cast OF red. The violet bronze
(the potash colnpoundl needs hgner temperature
PROTECTION OF MAPS PICTURES, &c. BY AN IN
| SOLUBLE CoATING.-Coat plate of glass thinly and
nniformly with warm mixture Of one-quarter of an
ounce of ox-gall aud one quart of solution OF giue
which would form a stiff jelly on cooling. When
the film is well set render it Iusoluble by immersion
for two or three hours in a solution of acetate of
alumina. which may be formed by dissoving one
ounce each of alum and of acetate of lead in pint
of water and decanting the clear liquid from the
| sulphate of lead formed, Then wash and rinse well
and give il an additional thin coating with weaker
glue solution and lay the picture slightly but uni
| formly moistened upon it. face downward; smooth
out by gentle rubbing, place III a warm room tniee
| to four DAYS. and remove from the glass; Wnen
Thoroughly dry by cutting the film around 1t. The
back OF the picture NAV be coated in similar man
| ner and it will then lie flat without frame. The
film NAV also be colored before applying the picture
| by immersion in a bath of cochineal, logwood, DC.
| PAsTEUR's PROCESS WITH WINE AND BEER.-The
| supposition that wine, treated according to Pas
tours method ceased to be liable to deterioration,
even with access of organic Spores because the
matter necessary for vegetable growth was seDar-
ated from the liquid in the operation, was not sub
stantiated by experiments of Nessler, who found
| that such wine when exposed to the air exhibited
| acetous vegetation, in consequence of which vinegar
was formed Absolute exclusion of air is therefore
necessary for the complete preservation OF wine so
treated. Application of the process has also been
made with the most satisfactory results at Mar
sees to the preservation of beer in bottles, by
heating 80 minutes in water-bath at I'D to llS!
| and then allowing it to cool rapidly. The taste is
| rendered somewhat milder by The operation, but
| with storage this effect ceases to be noticeable
When bottled with carbonic acid and well coTked,
it is very effervescent. To preserve it long time
| the temperature, raDQng between 115o and 1892
should be higher; and it is we'll to repeat the
| heating after several months.