New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-07-11
APPLIED SCIENCE.

quarter of an hour in fresh bath with two ounces
of chromate of potash, and rinse well in running
water Then boil for some time, until the bath is
spent, in kettle in which half pound OF sumac
and two pounds of logwood have been 6olled IN
bag removing the bag if the room Is needed, anu
rinse well on removal from this. brownish over
dyed shade may be impaired by passing the goouS
through weak sumae and sulphate VI H0u'
4 pRorrcr1oN OF LEAD WATER-PlpEs ny FILM OF
SrIPu1pE-As a result Of the following experiments
Willm announces that film of sulphlde oi i'"
forms an excellent protection for the me'ii as"In9
the action of water. Lead pipes were coa'eu W.
nally with sulphide, according to the hc'nou -
Schwarz by the action of solution OF SuipnluoU
o1in,, and were subjected at the same time win
others not so treated, TO the action OF ram SNOW
distilled and ordinary Paris city water After tne
from the ordinary pipes except IN tue cty wafer ana
;r IL also after several days. On the other hand IN
no case did the water from the pipes treated WIN
sulphde afford trace OF lead "iIhlh lh'ee o"'nS'
and with access OF ar
PREPARATION OF PnoToGRAPHuC TRACING PAPER.
"A paper sensitive TO light brought into the market
by Talbot of Berlin, under the name OF Lichtpaus'
napier by means of which any one unskllled IN
photography may copy plans, maps, &c, with little
tronbe.may be perfectly initiated by floating good
strong albumenized-or w-root-paper, for about
minute, on a bath composed of water 81 parts,
nitrate of silver three parts ct7c acid one rar and
tartaric acid half part, then drying H. ard hnaiy
drawing II slowly through weak solution Oh tai
taric acid. 1T will keep at least three months il
protected from light and moisture and does not re-
uuiTc tuning with Ammonia. Ionlng, winch Is III
most cases supertuous, requires very STRONG ana
alkaline bath.
DRY CLEANING WITH TURPENTiNE AND ITS PUll-
PIcATfox.-Artcles to be cleaned, except those of
silk velvet plush Sc. rubbed On sharp timed
washboard five to eight minutes in turpentine OF the
finest CUalitv in tiI-ned wooden vessel and after
beiIg placcd in a centrifugal machine, and then
hung up for two hours in dryir groom at l5j, they
will be odoress .clean. Fer silk. velvet, plush
&c. Venetian turpcntine is applied by gently rub
hing spots of paint. tar. &C. with CooG sponge or
wooden rag. Turpentnc that has bcGOmt turDld Dy
,se may he purifed by stirring il well with l-lOth
It's volume OF OF OF UtriO. and allowing IL 10 settle
over night and then, as precautionary measure,
Offering II through a felt bag beautiful BLUSH
tint can be impaired to pure white goods by tnIne
thc benlinc employed by adding to i some benzlnc
which has been coored b. sleeping IL 1t a piece oil
cotton COlored with anlline-bue
THE OccLrsIoN OF HYDROGEN ~ IRoN.-At a
reccn, meeting of the Philosopher Society of Man
chester England, Mr.. johnson exhibited some iron
and steel wire whose nature had been so changed
that from being exceedingly tor Oh il had become
,hort and brittle while it's weight was increased,
and a fresh fracture AZ any point appeared, when
ttrcatad chemically to show that the chemical con-
setitution Of the iron had undergone remarkable
change. Prof. Osborn Reynolds having made a care
fun examination OF this wire, seems 10 have eStab
lsbed the fact thai free hydrOs had entered ntOand
combined with TIE iron aud changed lt--a point OF
tIe reatest Importance in connection with the
ttructon OF ships and boilers since if, IS Is prob
able. the saturatiOn of iron with hydrogen takes
,i.co ,eLcu[er ovid1tnn pnps on i'm water then the
iron boilers aud ships may at times Ice changed in
character and rendered brittle III the same manner
- MI Johnson wire.
ANIllNE-BIUE on Wo0I.-Add to the water in
the kettle half pound Of solid chloride OF tin. and
carefully remove the scum hat forms; then, for q
pounds Of cloth or yarn, add pounds of sulphuuc
acid pound of Suphate of alumina- end another
pound of chloride OF tin, and work the goods IN TINS
bath Of an hour at boiling temperature. and then
add to the boiling bath TO ounces Of aniline blue,
soluble in alcohol in solution, prepared by bringing
part of il in ~ parts of strong alcohol or in 10 parts
of alcohol and 10 of acetic acid carefully to boiling
heat and continue boiling with constant stIIlug
for Of am hour, then dllutlng with water, ana pas
ing through hair sieve Tor instead OF TINS solution
anIlne blue soluble in water would be better. For
greater certainty il is best to add the alcoholic s0n
ton of auiline blue or the proper quantity OF that
,oublc in water. in two portions, aud 81 work the
goods in the boiling bath an hour after each addi,
lion. The color Is finally improved and preserved
from rubbing of by passing the goods threugh coid
soap bran BATH
CcFRUIIGNoS, FROM WOOD TAR, FOR PRINTING
FABRICS Although no method for the utilization
of wood tar is likely to prove of a. much practical
importance as the discoveries in coal tar on account
of the comparatively limited quantity of the former
produced experiments have recently been conducted
with this in view Attention first directed,
some wears ago by Reichcnbach to o red crystalline
prccpitate obtained by treating beech-wooe tar
with bchrOmate of potash and taftarc acid, or
solution of sesquisulphate of iron, and named by
him cedrret which afforded Indigoblue sOlu-
tion with concentrated sHlphurc acid, and purple
one with crelsOte. More exact recent investiga-
lions by Prof Liebermann have led to the produc-
ton of several new compounds from wGod-tar, one
of reddlsh-blue color being named cGrnlignon, on
account of the blue solution ii affords with suphurlc
acid. Further experiments by C. FISCHER led to a
very simple process for printing lively orange on
silk or wool, by dissOlving this substance III hot
alcohol aud pfecipltdtng II AGAIN with Watef then
tbIckening the paste win gum water OF the proper
consistency aud printing drying, and steamlng the
fabric. III steaming, the slight color OF the printed
portions disappears, aud after washing out the
inckening, "A lively orange NAV be developed on
them bV treating the goods III bath OF blchrOmate
f notasL or of sesquichOrde of iron They NAV then
be washed aud finished. Attempts 10 print with IT
on cotton have not thus far proved successful. Ex
peTimeuts large scale are u course necessary 10
determine the practical value OF the method.
DRY OR CHEMICAL CLEANING WITH BKNZINE.-
Securing with benzine has proved to be- undoubted
w. one of the very best methods, since the end is
perfectly accomplished without shrinkage or inJur-
ioue effect upon the color finish, 80 that the most
elegant garments need not be taken apart nor lace
or velvet trimmings he taken of. while with mems
clothing II is not noticeable that they have been
washed. The articles, freed from dust and dirt by
beating them while dry, are first simply thoroughly
nosteued with benziue in a tinned-cOpper or stone
ware vessel and well squeezed in il with the hands;
silk pieces ribbons and heavier portions that may
,.c,,;y. heinO hr,Isbe1 well on "a ZnC-cOyered