The Milan exchange. (Milan, Gibson County, Tenn.) 1874-1978, 1880-02-05
USEFUL Hsp SCIENTIFIC.

Il UCEr Ill AND SttENt1fICs
" -rNAEH EIg 10
: HINTS ON THE USE OF, ,PLAsTER-oF-
PARIs.-The plaster may be made to
"set'' very quickly by mixing it in warm
water, to which little sulphate of pot
ash has been added. Plaster-of- Paris
casts, soaked in melted paraffine, may
be readily cut or turned in a lathe.
! They may be, rendered very hard and
tough by soaking them in warm glue
+, size until thopughly saturated, and al
lowing them to dry,a Plaster-of-Paris
mixed with. equal parts of powdered
pumice- stone makes a fine mold for
casting ftisible metals; the same mix
ture is useful for Iincasing, articles to, be,
ssoldered or brazed Casts of plaster
of y Paris may be made to initiate fine
\ bronzes by giving them two. or three
coats of shellac varnish, and when dry
applying coat of fnastic varnish, and
busting on fine powder when the
lmastic varnish becomes sticky. Rat
holes may be effectually stopped with
4 broken glass and plaster-of-P Paris. The
best method of mixing plaster-of-Pa Paris
IS to sprinkle 1t into the water, using
rather more water than is required for
the batter; when the plaster settles,
pour.of the surplus water and stir care
fully. Air bubbles are avoided in this
way Boston Journal of Chemistry
. I, FUNGrdIN MAN.-The human ear is
sometimes attacked by disease which
shows itself in the, form of a running
sore; in many cases the tympanum IS
destroyed and hearing lost before the
nature of the malady is discovered. The
disease is due to the growth of micro
scopic plant or fungus of the ASpergitlses
family. 1t especially thrives when, from
any cause, the secretion, of wax in the
ear is. stopped or hindered. The micro
scope is a valuable assistant in the dis
ooyery of this fungus Consumption,
the most disastrous malady that .afilicts
humanity, is now said to be caused by a
yeast plant that flourishes in the blood.
The presence of this fungus in the blood
isreadily shown by the microscope, and
now forms the subject of careful study
among physicians. DR., Ephraims Cut
ter, M. D., of Boston, Mass, has devot
ed much labor to this subject, and, we
Understand, has recently produced mi
cro-photographs of the fungus. with
Toles's remarkable LIS objective We
believe that DIR. James II Salisbury of
Cleveland, Ohio, was among the earliest
TO detect and describe this curious Yeast
plant of the blood Scientific american.
ANEW loom has recently been brought
cut in England, which has. excited much
Interest among the manufacturers of
textile fabrics. 1t is loom for Knit.
ting, on what is claimed to be an entife.'
lgpew principle, The yarn, which is
drawn .direetfrom 492cops, islarrangeG
over the width required like a warp for |
the ordinary power loom, and by. SIM
pie contfivance the whole of the threads !
are shifted to such an angle that the |
needles are enabled to catch each thread !
at the same instant, thus knitting. the
entire width at the same revolution
The loom, occupies less space, and re- i
quires less than half the power necessa-
~ for the power-loom now in use. 1t |
makes from u to 15 inches of closely |
knitted fabric in one minute. In two |
hours and twenty minutes, including
4S 1-2 yards, y inches wide, |
can be produced. The fabric produced |
has been, pronounced by competent
Judges to be superiorHin strength and |
durability to the ordinary woven cloth.
Each stitch or loop being locked, the
cloth will not, unravel. A variety of |
designs has been produced. Any mix
ture and variety of coloring can be in
PRODUCED, and the selvages are perfect,
and may be fancy or plain, as required.
The loom has also been tested with
fender yarns, and found to work salts
...
PURIFICATION OF SMOKE inven-
ion has been brought forward in Eng
and, which is described as removing
)ne of the chief nuisances of manufac-
5UTring towns-that is, it washes the
tense black smoke of the tall chimneys,
making it so white that it does not soil
pocket handkerchief, and obViatesI the
for chimneys higher than those
If ordinary houses. Pollution of the
by injurious gases will, 'itis9
be prevented, disagreeable
'dors will be destroyed, and the I'M
ightliness Of the black and ubiquitous
rloke will be removed. According to
his plan, the dense and gas-laden smoke,
liter it leaves the furnace and before it
riters the chimney, is made IT" pass
hrongh flue, and over tank of water
lolding soda ash in solution. Paddle
wheels, with fans just touching the wa
er, are suspended over the tank, the
lumber varying with the size of the
Set in rapid motion,
hese wheels dash the water up in afine /
pray, which washes the smoke ahastena
~ on its way to the chimney Success
i've screens of lath, down (which the
V:!ter taickles as it returns TO Che tank, z
ford additional facilities for theldeten-,
icn of the impurities in the smoke. The
evolution of the paddle-wheels in the.
ERECTION in which the smoke is annoying,
Increases the draft, and insures more
inform heat in thefurnaee. 1t is stated
hat, 50 pure has the smoke been made
y this process, that persons have j.
rsathed with safety over the top of a
Kinney, and a handkerchief, which be-
ONES Instantly black Withi SCOT when 4.
ed, in the smoke before cleansing, re-
lains. perfectly. white when held in the
irified smoke 7 e607h a0i.ar SD irt1
--2 40 o.
low They Run Street.cars in San
oGO Francisco. :
9UAa1 .WIsaA z3xX Fags1
-t9re OF the novel features of this city, =
-hich attracts irtlrnedfafe atter,tidn IL