Sacramento daily record-union. [volume] (Sacramento [Calif.]) 1875-1891, 1882-11-09
MEcHAs1cAL AND INDUSTRIAL NOTES.

4
| DJTcH EXPOSITION. is consider
able STIR OF preparation on the continent
and In England for the forthcoming Inter-
national Colonial and General Export Ex-
| port Exhibition at Amsterdam. The op-
portunlty offered to manufacturers to en-
ter into closer relations, particularly with
the rich Dutch colonies, has been very
eagerly seized, as it promises to open field
which has hitherto been thoroughly mo-
nopolized. There are evidences on every
hand that tie Dutch Government is begin
| ming to realize the Importance of develop
Ing the neglected resources of it's colonies
and OF lettering them less closely to the
mother country. American manufacturers
nave now been invited to take an active
interest In securing the share which the
superiority of their goods entities them to
In many branches of industry.
| LACoUERINc. -Lacquering brass work
ana dipping after the approved manner is q
! process to prevent oxidation, and SO pro-
Sects brass OBJECTS against climatic infiu-
ences. The effect of dipping is to change
the dull reddish hue of castings to bright
TINT or brass color the burning liquid into
which the brasswork is dipped Kisses and
bubbles upon the casting as it is lifted from
the bath, removes all impurities and leaves
the yellow metal perfectly clean. So pow
erful is the cleansing agent, that it COM
mences to simmer, and becomes green as
the brasswork is removed to the contiguous
water bath. in which it is thoroughly
washed and made ready for further treat
ment IN the process of finishing.
To PREVENT SILvERwARE FROM TAR.
NIsHING.-Solid silverware, as well as
plated goods, grow dark and furnished in a
very short time when exposed to the air,
and even when put away in q dark place.
This Is especially the case where hard coal
Is used In the house or neighborhocd, as
| the sulphur In the coal, liberated by heat,
Is sure to stain all the silverware within
reach. This annoying furnishing can be
entirely prevented by painting the silver
ware with soft brush dipped in alcohol in
which some collodium has been dissolved.
| The liquid dries Immediately and forms a
thin, transparent and absolutely invisible
| coating upon the silver, which completely
protects it from all effects of the atmo.
| sphere, etc. 1t can be removed at any time
by dipping the article in hot water. This
recipe has been in use for some time in the
large establishments at London, where
most of the goods in the showcases are
protected in this manner,
WARNING HOUSES BY THE Suns RAYS,
| Professor E. S. Morse, of the Essex, Mass,
Institute, has devised an ingenious arrange
ment for utilizing the heat in the suns rays
in warming our houses. His invention con-
slsts OF surface of blackened slate under
| glass, fixed to the sunny side or sides of
| house, with vents In the walls so arranged
| that the cold air of a room is let out at the
| bottom Of the slate and forced in again at
| the top by the ascending heated column be-
tween the slate and the glass. The out
| door air can be admitted also If desirable.
| The thing is SO simple, and apparently self.
evident, that one only wonders that it has
not always been in use. Its entire practi-
cableness has been demonstrated in the
heating of the Professors study in his cot.
tage at Salem. The value of the improve
ment for daily warming buildings like
churches and school houses, which, when
allowed to get Geld between using, con-
sumo immense quantities of heat before
they are fairly warmed again, is evident.
OF course some other means of heating may
be available when the sun does not SHINE.
THE CARRYING CAPACITY OF FREIGHT
CARs.-lt is only few years since freight
cars were allowed to be loaded with more
than ten tons. Now but few eight-wheel
cars are built with a carrying capacity of
less than twenty tons. The advantages
and economies secured by increased capacity
are such that committee of the Master Car
| Builders Association has recommended the
building OF twenty-five or thirty.ton test
cars, believing shS. -fIsisat can he csEEisd
cars With as much s,fety and
with greater economy than in cars of less
i capacity.
To MAKE A Coon SAND PAPER. As in
! cleaning woodwork, particularly nine and
other soft woods, one process is found To
answer better than another, we NAV de.
scribe the manner of manufacturing a stone
paper, which, in some cases, will be pre-.
| ferred to sand paper, as it produces a --oI
face and is less liable to scratch the
Smooth on both sides, with pumice ,.r
any good tough paper, and tack va
| board, give the paper coating OF
| glue, size, and then sift . quaint -
tnely-powdered pumice stone thro e.
sieve of moderate fneness. When the
surface has hardened, repeat the process
till tolerably thick coat has been formed
upon the paper, which, when dry, will be
| fit for use.
TELEGRAPHY.-The telegraph companies
are utilizing the Brooklyn bridge at rapid
rate before it is finished. The Secretary of
the company says there are no fewer than
$50 wires already in position on that struc.
ture, many of which are private CONNER.
cIal telephone wires. Many of them are
gathered In single insulated cable, as in
the case OF the Metropolitan Telephone
Company and the Gold and Stock Tele.
graph. Some of the cables contain over 80
wires. The Bridge Company receives no
uncomfortable revenue from these tele-
graphic wires, each one of $50 paying $50
per annum. 1t is a condition that none of
these wires shall interfere with the work
on the bridge.
A New USE FOR OLD I'm CANS AND
SCRAP TIN.-According to the Berg and
HuettenmanHische Zeitung better method
for utilizing old tin cans than simply to
melt off The solder has been devised. f..
Rousset first heats the tin, old or new, in
an oxidizing flame, which burns up all the
pure tin and that combined with iron.
When this is stopped, the scraps of iron
are seen to be covered with brown and
brittle crust, the upper layer consisting of
oxide of tin, the lower of magnetic oxide
of iron. 1t is passed through rollers and
then forms powder that contains both OK.
ides. The iron that remains after sitting
out the powder makes good wrought iron
or cast iron, but is particularly fitted for
precipitating copper. The oxide of tin,
although mixed with oxide of iron, can be
easily worked into tin, and the metal OBJ.
tanned from it is free from sulphur and
arsenic. But will it not contain traces of
lead
Low WATER IN A BOILER If. from
any cause, the water gets low in the boiler,
bank the fires with ashes or with fresh
coal as quickly as possible, shut the
damper and ash-pit doors and leave the
fire doors wide open do not disturb the
running of the engine, but allow it to use
all the steam the boiler is making do not.
under any circumstances, attempt to force
water in the boiler. After the steam is
all used and the Boiler cooled sufficiently
to be safe, then the water may be admitted
and brought up to the regular working
hight the damper opened and the fires
allowed to burn, and steam raised as
usual, provided no injury has been done
the boiler by overheating.
A SURPRIsE.-Detroit furnishes q sur
prise in the shape of young man who
studied medicine with one of the best ply.