Blue hen's chicken and commonwealth. (Wilmington, Del.) 18??-186?, 1862-05-28

unites with the alumina in the clay formin
alum. The mass is now treated with boilinl
water which dissolyes the sulphate OF nlumina
and the liquor is then ruu of into anothe
vessel in which it crJstalizes, forming til,
alum of commerce.
Wooien Substitute for Sponge.--J. Mason, o
Nottingham, England, has obtained paten
for nit king \ Topped fabric of fleeey wool, t,
be used as substitute for sponge. A chain o
loops is first knit, corresponding with thu
size Of The sponge required. Tho ends of Thu
ring Of loops thus obtained are then unite,
together, and succeeding rows are formed
! within the first row, progressing narrowing Al
the knitting proceeds until the center is gain
ed. This forms the inner surface of thu
/ wooden sponge. Layer upon layer of loop
are formed in this manner until the desret
size is obtained To prevent the wool iron
Telling it may be mixed with cotton. WooleI
sponges may thus be made OF any form o.
size.
Ne,e Chemical for Tanners.-ln treating skin
to open their pores after they are unhaired
they are placed in bath of pigeons and dogs
excrements. II is quite difficult sometimes tc
obtain these peculiar substances for III,
purpose stated, therefore substitute discovered
for il is prepared by soaking fish in water
heated to 2l2o in u close vessel for about
three hours, then running on the contents Of
the vessel init vat and allowing them Ia
stand for about twenty days the liquor is
next run through sieve to separate the solid
particles and it is Thea employed for the pur-
poses stated patent has bee- obtained for
tins product by James Steart Of L.-don The
product may be OF great use to some of our
morocco and sheep-skn leather dressers.
frsserping finder. A patent has been
obtained by 7. Cooley, of Meerhoiz, Hesse,
for IN, IL a., 1. .
and more enduring, as follows "A strong
solution OF potash, baryta, lime, struutis, or
any OF their salts, are forced into the pores of
timber ia close iron vessel by pump. AZ
ter this operation The liquid is run Off from
TIC timber and hydro. tlne -silicic acid is forced
in} which, uniting with file salts inithe timber,
forms ansoluble coupo1nd, capable of render
ing the wood uninfaumable.
ffEo Sif'cdte Of Tin and Zine-Mr. Cooley
has also taken out patent for making pig
ments for glazing and cnameling by dssolying
the oxide of tin or zinc in fluo-silicic acid
then acting upon the tin with sulphurated
hydrogen which produces a snlphide that
may be applied as a beautiful enamel in the
manufacture of porcelain. The fuo-silicate
of zinc is formed by dissolving the oxide of
zinc IN hou silicic acid, then drying the pre-
cipitats knd using it by itself or mixed with
oaryta, rs pigment or enamel, on porcelain.
u IS also ionni to be n good substitute for
lead in tho manufacture of glass. Tue
patentee states that the glass made with tits
lux is very pure and free fran veins.
Making 1a6es Of Poper.-A patent has been
ootained ny W. Il. Crisnin, of Slrhtlofd, Essex,
England, for making curved tubes OF paper as
follows -flie Improvement Is intended to
obviaie difficulties which have heretofore
attended the manufacture of such tubes In
order to form curved paper tubes the paper
is, in the first instance, covered with a coat
ing OF pitch. This is conveniently done by
reducing the pitch to n state of powder, which
Is sifted or distributed over the surface of the
paper, the latter being exposed by means of
not metallic plates or otherwise to a suf-
Client degree Of hent to melt the pitch. The
paper thus receives perfect and even coating
OF bltuminous substance. The paper having
been prepared, strips thereof are wound
spifally around mandrels of the size and form
OF the tubes which 1t is desired to manufao-
lure me mandrels employed are Of metal,
and may be either solid or hollow. In the
latter case heat may be impaired 10 the interior
by means of hot water, steam or hot air.
Upon the prepared paper being twisted round
tne mandrel, MS mentioned, the pitch with
which the former is coated is partially melted,
causing the commissions of the paper to adhere
togelheri the compression being continued
until the tube or pipe is of sufficient thick
ness, c5ating of pitch being given from time
to time as may be deemed requisite, while per.
feet smoothness and regularity of form may
be obtained by moulding with the hand or by
mems of suitable tools. The mandrels should
ne covered with grease or some other sub
stance which will prevent adhesion of the
paper, hnd the curves employed should, in
all cases, be portion Of true circles III order
that the mandrils may be withdrawn without
Injuring the tubes If considered requisite,
greater strength and hardness may be given
70 the tubes by employing external pressure
iunns the process of manufacture, and extra
ayers of paper may be used at those parts
which require greater strength, and, in some
,asesi layers of canvas or calico may be added
or the like purpose.