New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-08-22
APPLIED SCIENCE.


.J.p.Nrsr None OF PRESERVING MEAT IN sum
MER-The meat is covered completely, in porcelain
howl with very hot water, and oil Is then poured
nnon the water The air is thus excluded and the
eoagnIation of the albumen in the external part OF
the meat doubtless aids In preserving It,
A PASTE SUPERIOR TO GUM-ARABIC.-A brilliant
and adhesive paste, adapted to the uses of manu-
facturers of fancy articles, painters, &c, may DC
made by dissolving casen preciptated from milk
by acetic acid and washed with pure wafer III
saturated solution of borax.
DANGER OF CLEANING BOTTLES WITH SHor'--A
communication to the Paris Academy cohueunhS 'no
use of shot in cleaning bottles, as prac'iceu /" may
households. On the ground that carbonate Oh ieau
10 Termed in shaking them with water, and that
some shot. with their not inconsldeTaDie amount VI
arsenic NAV possibly remain i'll the bottle.
w,rrp-pRooF COMPOSITION FOR COATING FAB
RIcs.-Material coated. by means OF Drush' Win
the following composition, patented In Engiaid anu
then dried and exposed to the light Is said TO become
water-proof. Oil. varnish and glycerne are added
TO solution of oasein in ammoniacai wafer anu sa d
mixture IL boiled, and bichrOmate OF potash aoueu
to il after cooling.
PROPAGATION OF POTATOES BY CUrrINGs-Pota-
toes Of large size are said to be produced by monk
in France by cutting two side shoots from each salR
when il is five to seven inches high. and setting
them in good. rich, mellow garden soil. In Few
DAVIS they send out roots and form tubers about as
carly and in rs large quantities the original staK
while the latter does not seem to be injured oy INC
moderate pruning. The experiment also seems "
have been successfully tried elsewhere pieViousy'
The plan NAV be found especially serViceaple III tno
propaCation of new and rare varieties for seed.
Am TO INVESTIGATIONS IN AGRICULTURAL
SC1rNcr.-A note worthy example of aid to sclentihc
investigations has been given by the Royal Agricui
tural Society of England, in the grant OF tIOo 10
Prof de Barry. formerly Of the University al haAie
and now of the University of Strasburg, for new
series of Investigations upon the nature OF potato
disease Prof de Barry was also the recipient OF
nr;ze Of f1oO from Lord Cathcart for investigations
mon this subject His work in this line OF research
has extended through a number OF years. anu Il u
great scientific as well as practlcai value
THE Use OF AMsLER's PLANIMETER.-The well
known planimeter of Amsler that has during the
past 10 years taken so prominent position as an
accurate assistant in all engineering calculations,
has had a new suggested by kopcke. VINO, al
recent meeting of the Association of Engineers ana
Architects, at Lepsc, explained how the panimeter
may be employed for the determination of the cubic
contents of entertainments, excavations, ana othef
similar problems. il to this new use we add the
applcation suggested BY Prof. Frankel, to the de-
Termination of the weight and strength OF tTestes
and beams IL becomes evident that the planiheter
IS destined TO occupy still more important place III
the engineers Office.
AUTOMATIC GAs-LIGHTER AND ExTINGU1sHER-
Instead of electricity for lighting gas, Baumeister
employs small accessory flame. which burns all day,
with consumption of 0.0 cubic feet per hour, or
even less although when less than 0O5 cubic Feet,
the flame is liable to be extinguished by draft by
regulation of the pressure this flame is made to fare
up and ignite the principal jet, and 1T then goes out
and again by a change of pressure the principal
fame is extinguished, and the small one relighted
and the flow of gas to the principal burner again
completely checked. There is also an attachment,
which, under the average pressure, allows only a
definite flow of gas through the burner and whicD;
ii rs suggested. also be arranged as simple ana
convenient pressure regulator.
[7O76
New MANNER OF PRODUCING SHADED YARNS
Instead of the usual method of letting down the
warn, from time to time, deeper into the dyebath,
by lowering the rods on which it is hung upon NOV
able pins in holes in vertical supports in order that
successive portions may be more deeply shaded 1T is
much SIMPLER as well as much more economical, to
dye first the whole skein in the bath. in the usual
manner TO the highest shade desired; allow it to
hang. and draw off the bath by a stop-cock or
dip it out until it's level is where the next
deeper shade the yarn is desired then to lift the
yarn strengthen the bath and hang it in again. and
TINS TO continue as needed to impart the different
shades to draw OFF and strengthen the BATH As the
deeper shades are successfully impaired in dimn-
shed quantities of BATH which alone need be OF the
required strength the economy of the process is APP
parent. II is said to be secretly employed In some
Establishments
STEAM Pressure IyDIcAToRs.-A most exhaustive
n A.
experimental investigation by Prof. Berndt into the
accuracy of the indicator diagrams used IN connec-
ton with steam engines has been published at the
Chemnitz Industrial School. The want of accurate
knowledge on this subject seems to have justified
Prof Berndt in the extraordinary and thorough
ness with which his work has been done. The re-
snlts of his investigation are given in detail.
The Richards indicator" and the Ashton and
Story Indicator" are two instruments specially eX-
amined BY Berndt; and in these the expansion and
contraction of free springs. at ordinary tempera-
lures, are employed as the means OF measuring the
pressure of the steam-a very decided superiority
being manifested by the latter instrument SO long as
the spring is not warmed i'll consequence OF the
work that IL is called upon to perform Even Wnen
so warmed the latter instrument seems TO have
decided advantage over the Richards indicator.
CASTING CYLINDERS, CALENDERs, TUBES, PIsToNs,
&C, OF GLAss.-According to a process, patented by
Chedcey glazing rollers calenders &c, may be cast
of glass in a cylindrical mold, provided with NOV
able bottom to which rod is attached, and which
forms the core of the roller by placing the movable
bottom near the top of the mold at first and gradu
ally lowering it as the glass is poured in, thus pre-
serving the casting free from ar-bubbles. The cast
ing is then annealed in the mold, and after the axis
has been properly eentered by wooden wedges and
fastened with cement, it is turned in lathe with
diamond, the aid of emery or sand, and water and
polished as usual with rouge, or putty. Pump pis-
tons may be cast in the same way. and the rods