New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1873-12-03
APPLIED SCIENCE.

PRESERVATION OF TEAsEL-CARDS.-Tea
for dressing cloth may not only be rendered tougher,
more elastic. and durable but adapted to working
under water, BY impregnating them with q fontion
Of about pounds al supIdto vi copper IN 30 pounds
water Sulphatc ol zane may replace snIphate oil
copper
To Color CH,vOIs oN HALF-wOoL GARNENTs.--
For 10 pounds Of material prepare, ia "a perfectly
clean kettle. with soft water, bath Of about one
fourth of pound of annatto; heat, add the gar
ments, heat to boiling, and boil for hall an hour
then rinse well, pass through q weak warm sui
phuric acid bath, and again mise we'll
IMPROVEMENT ~ RFLLS.-The English Mechanic,
in referring TO the now method Of making rides
lately described in its columns N which the riilinS
il confined to about six inches IL the barrel near
ihe muzzle, states that this was tested lately 10
Wimbledon, with results which render turtber IN
quir, desirable. While the accuracy of the shooting
is if anything improved the rccO appears to be re-
duced to "a minimum.
EXPLOSION II FLOUR MILL NEAR GLsGow.-A
recent explosion at the Tradcston Flour Mills il
Glasgow was explained on the theory that minute
particles floating in the atmosphere became so
mixed with oxygen as to form an explosive gas and
this conclusion has been cOrrObOrated hy "A similar
explosion at thc Park Brewery during The grinding
of q quantity of malt. y small Hint was introduced
into the malt between the iron rollers of the MILL
and spark being struck the floating dust immc-
diatcly exploded with loud report.
COMPOSITION FOR SIGNAL LIGHrs.-The follow
ing mixtures atIordiug pure cOl0red lights for sig
nails have been patented in England: White: 100
parts chloratc of potash 10 suphide OF antimony 10
boiled linseed oil Rcd 80 parts chlorate of potash
5Onitrate of srontia charcoal. and enough lnseed
oil to give a doughty consistency. Green 30 parts
chlOTate of potash, % nitrate OF bayta charcoal,
A Ill nIt.va 81
is in tho of linseed oil. which may be replaced by
turpentine, or "A RESIN.
BLEACHING DIsooLopTD FIANNEL.-It was found
| by Prof. Artus, that flannel, which had become
| yellow by lying for SOME time when treated with
| a solution of i pounds of Marseilles soap in 80
pounds of soft water, with the addition Of J Of an
| ounce of ammonia and subsequently rinsed, was
| much improved in appearance. The bleaching was
more quickly accomplished by soaking the articles
for an hour in dilnte solution of acid sulplte of
soda then stirring in dilute hydrOchl0ric acid 40
parts wafer to l of acid, coy crlng the vessel, and
| allowing il TO remain quarter of an hour, and
| aftcrward thoroughly rinsing the articles.
TIMING LINEN AND COrroN FABRICs-The fol.
lowing process is given by Il. Jacobsen for coating
linen and cotton fabrics with heavy, flexible. bril-
liant film OF tin. 4 thin paste, formed by stirring
commercial zinc dust into n solution of egg albumen
Is liiu OIL the VI pressure. lnlS
coating is fixed, after drying, by coagulatng the
albumen by heated steam. the fabric being then
placed in bath Of perchloride OF tin. The metal
precptates upon the zinc in a hnely divided con-
ditOn, and the article after being we'll rinsed with
water and dried, is put through glazing machine,
which imparts brliancy to the tin coating. Beau
tful results be obtained for decorative purposes
by printing or tracing designs and linen cloth thus
timed could he employed in many eases "A substi-
tue for tin foil elegant, tenacious waterproof
wrapping
Phosphorus BRoNzE.-The result of three years
experiment, the part of certain manufacturers in
Europe Of the OF the phosphorus bronze, tends
TO ahix high value 10 this alloy. In the instances
referred TO il has been used to much advantage for
the great bearings Of the plates in general rolling
mills and for conical gearing in universal rolling
mills in cases where the rollers weighed five tons
ID was found that the gear when made of hard cast
iron, broke frequently; tins replaced by wheels
of ordinary bronze and then by those Of phosphorus
bronze The duration of ordinary bronze wheels
did not exceed, on average. five months, while
those made of phosphorus bronze for about nine
months This material has also been applied with
great advantage moi only III the making OF pinons.
but in the driving axes of mills IN the latter
the superiority seeming 10 depend not on the hard
ness but on the very great resistance OF the alloy
the arbors in the phosphorus bronze twisting mnch
lose than those made 0i forged iron, and not being
liable 10 break like tboee OF east non