The St. Mary banner. (Franklin, Parish of St. Mary, La.) 1889-1931, 1907-04-27
-rw Uses FOR MICA.
IS, Industry Demands What
. reconstructed Plates.

InduStfy Dciha"' LUX
nd cred reconstructed Plates.
;,,os of mica has grown to
important industry, e 6, eel !
|. 'r has been found to be an in
: - great value in electrical ap-
" Init little is popularity
!, rs sources. Some inter-
4. Information is given i in an ar
aThe Uses Of Mica" contrib
!. cosmos (Paris) by Mr.. Four
: vica has been used for CEN
y notes, but its uses have
4. multiplied in recent years.
Is only value was as a glazing
. i or as decoration. but
1 now applied in many new ways:
..Oecially to the development OF
.,sctrical industries. The term
a." embraces a group OF complex
800 Its most remarkable char
s.,. common to all these vari-
q = The ease with which they
Il. ;,to thin, flexible and often
...,ent leaves. IN thick plates
pr..rs Opaque with q black OF
~, ~ rejection. This is due to the
s.rahle surfaces OF cleavage
.hich the light is reflected sue
s,s,v finally being entirely ab-
ssd transparent sheets OF pale
\ ne often utilized for glazing.
.,,llv in stoves and lamps, and
n ,,e absorbs about q third Of the
~. supply. The writer contin-
-. most important use, however.
~ Is an insulator in electrical
Mica is infusible or nearly SO.
.,.,neab,e to moisture. elastic.
nm and cleavable; these quail
re not possessed all together
,sy other known substance. 1t
AZ employed for the insulation
4. wires and bars Of the arn2-
!. h dynamos, that is to say, be-
u the conductors and the iron
For this a very flexible mica
ssuiret-not white mica, but am
eolored. Armatures with mica
uhiAd conductors are incombusti.
y seryes also for the mannfac-
4 the resonating diaphrag-ns OF
nAcaes and Photographs.
= leaves in natural mica there
1lten holes, striae, or small in
ll quartz crystals, which greatly
h use. The inclusions, in par
III, facilitate the establishment
I'M circuits. Thus the electrical
u1ky has recourse to the use OF
u Of reconstructed mica.
= obtain these, sheets Of paper
- 8 required are spread with
hc, and powdered mica is
nhjed over them in as uniform a
y 8 possible. After drying, a
1 layer Of gum is applied, then
y mica. and SO on, until the de-
- thickness is reached. The plate
INFECTED to a pressure Of about
\ pounds to the square inch and
a same time heated by steam.
Product thus obtained is homo
ols, free from cracks, OF uniform
ness, and does not absorb mois-
u the heating has been properly
It may be sawed, cut and
~ with ease. Finally, it is
Ne than natural mica. Conse-
~, It has taken the place OF
lttG TOR work of great size and
~ that Of ordinary size.
= mall establishments the man
alls Of this 'micanite' is carried
Y hand; but on the large scale
gaformed mechanically, SO that
roman may make about seven
Ut In day, which would re-
% work of twenty women
0eir hands only. The manu-
= q tubes, rings, ETC., is car
y similar way.
powder is used for the dec
g Wallpaper, as in the pro-
q snow effects; it is also
nployed in compositions that
aecnducting to heat.
j y Of mica are found in all
but the industrial market
led chiefly by India, Canada
United States. "-Transla.
lae Tor The Literary Digest.