The sun. [volume] (New York [N.Y.]) 1833-1916, 1894-02-25

portion 10 taken By footstep through the re-
yolvinR spindle whore alone there Ia any irio.
enough to prevent escape Of the water.
The process OF Lippmann. or Raleigh. is
pronounced by a writer in the Opncidn as
being In principle. the most wonderful lnnova-
ton In photography which has been made
since the first Invention OF that art. the
strata OF violet lridescence lying at the limit
and those due to the more lengthy stationary
waves lear to the limit OF possible microscopic
separation-the realization OF this process
thus intimsting, among other things. how per-
feet IT, the control which 10 possible to be at
lions Of what might betsrmed molecular mecn-
anism. II is possible, this writer remarks,
ia sucS m h .hat IL. psriosic str@ctase
may be correlated. not with the o. most in Unite
range OF tints OF nature. but with limited
the equivalent tints OF visual color sensation.
and in which way 1t would be easy to make
great i'm provement on the original form Of the
Lippm ann process.
An English manufacturing firm have de-
signed q new method for producing designs
on piie fabrics. which is said to overcome some
OF the well-known difficulties hitherto expe-
rienced. This method h based on the fact
that the pile threads possess a great degree OF
porosity and capillarity. also on the fact that
tin crystals and tin acetate have the property
OF reducing or discharging many coal-tar col
ors. especially those OF q basic character. In
pared printing block or roller. the raised por-
tons covered with felt, this block being moist
snd 10 for ss
fabric with light pressure; the tin solution
runs up into the body OF the pile. and. on
destroyed, according to the depth Of color and
the strength Of the tin solution. Thus either
are obtained.
Another process is report cd for removing
the various Impurities from wool either In Its
raw or rough condition. the machinery for
this purpose consisting OF three bees all in
closed or connected tog ether these are shaped
like W. and through the series the wool Is
made to pass between travelling aprons. thus
insuring the passage OF all Of 1t through the
extracting materials. In the first bee. the
wool 10 treated with q vol atile solvent like car.
grease from il in the second. It comes in con-
tact with cold water. which dssolvss out any
soSpy ana G,hss so,aoie mater er th,t may Do
rial is treated with hot water, which eliminates
most, 4 not oil Of the impurity which remains
be that. though the theory upon which this
mechanism is based L. good. much depends
on the care withwhich it 10 constructed
The application OF aluminium to the manu-
facture OF cages cables. DC. has for some
time. as stated in tho Aoniteur Indiist-ieL been
q matter Of study By the engineers OF the
principal coal mines OF the north. in France.
Concerning this. IL IL remarked that the DIFF
ference in weight between aluminium and iron
aud steel is considerable. and consequently the
use ofthe former Just increase the load capac-
ity. but. on tho other hand. the continual low
ering OF the price OF the metal renders Its use
possible. Tho opinion ia expressed that, while
the use OF alu mum as the material for certain
mi ming apparatus or parts OF apparatus may
be feasible. IL is doubtful whsther. in the pres
fantnrs eneinsers wonid caIa 10 rslv nnon
hoisting cables made OF aurpinum steel wire.
either In round laid or fat woven cables. IL an
extremely reliable material. accidents from
their brsakags being extremely rare, and II 10
thought that, while the noRoorros.bllity quail
ity is to be considered point In their favor the
increased diameter OF equivalent aluminium
cables would be disadvantage