, 1865-10-28

liners their novelties, but continual approx.
nation Is being made to perfection in imitat.
tnE the endlets minor differences IN teeth, and
in adapting them 10 new methods Of adjust
ment to the plates to which they are to bs
ahxed. 1n this mandatory from 100 to 800
molds 1n are In use, making IL all upwards Of
l0.N0 shapes Of teeth. -,
Here Is spitefnny busy little machine, too
busy With one particular process to tell "
what It Is doing, and yet we discover that It
L eating wire and splitting ont tiny piatfna
pins at The rate Of sit hundred minute. Each
Genes out beaded ike q, solid head brass pin,
With rough tndentations in the other end, to
be firmly held in the plastic body Of the tooth
until fierce heat makes the indissolub1e union.
The strength md infusibility and incorrupi-
blcness Of the platina makes 1t the very Close
companion Of mechanical dentistry, leasin1g.
is now eight dollars per ounce. The consump-
ton Of this metal In this establishment
reaches the substantial sum Of cighty-six
thousand dollars per aunnm.
Nc come now to the moulding room. Here
TIC sec the use Of those little p1atina pins, and
are told that there are more than twenty
varieties of size adapted to the different
sizes Of teeth. In each tooth matrix we dis
cover two minute holes which workman,
with rapid tweexers, is fitting with pins Of the
Proper thickness aud length which are to form
the future fast eniug Of the tooth to the plate
OF gold, eilyer or rubber. The word is then
passcd to the next workman, wlo takes up on
point enamel, and With this forms the cutting
edge Of the tooth. and passes the mould to his
netghbor, who fills the matrix with body,
then closes 1t. II Is then pressed By machin-
cry ard deposited in tho drying orcn.
Carefully watched, II Is taken out at the
proper moment md cmptied Of Its contents,
which, tender and brittle, are laid on clay
slides and subsrrur CT hfcr$ed n fhn 1rn.
cess called buiscuitlng, which Is done by
bringing them to cherry rcd 'heat. They
are now like chalk, and can be cut and filed
as desired.
From the Buiscuiting Furnace they are car
rted to the Assorters Room, where they are
OF set keep company through all their
varied experience. This work Is done by small
boys whose qu1ckness Of perception qualify
them for the work, and who become 70 expert
that they know every tooth and the number
of the mud from which It CAME as
well as they know each other. Ar
ranged in rows in tin walters the
room, where the busy fingers OF forty tidy
md happy looking. yoang Indies smooth them
into readiness for the Enamcllcrs' room. This
also furnishes employment for fair fingers.
The enamels are laid On with brush, and is q
work requiring delicacy and care Having
scending again toward thu ground floor, from
which they started, h,.lt in another room to
receive the gum enamel, which, when the fire
shall hare passed its verdict upon them, will
reflect the rosy checks Of the artists who laid
It. But, taking up the line Of march, they
are again halted Tint other light fingers, the
oWners Of which are called flnishfng.trin-
the sides, make true, with fine pointed instru-
ments, the arch Of the gum, and lay them
en- ef1lly on beds Of quartz sand In trays Of
htc-clay, ready for the fiery trial through
which they are to pass, and without
which they are unfit for life's work,
Beyond this nostool can follow them. In
pe1feetions heretofore could be repaired, but
either perfect or failure irrencdiablc. The
furnace is an institution entitled to respect
for its intensity. In Its centre Is mull1c Of
tircelny, entirely surrounded by the glowing
fuel, charge OF half toms weight Of coal,
Itself carefully br1cked up before firing, that
teeth. Take out the small half oval door Of
the mutne, and sou shall see an inner glow
the eye shrinks from registering, an fncan-
deseuce that siartlcs you By its ferror. In
from fifteen to thirty minutes teeth and fire.
clay slide, glowing like the oyen, arc taken
out done and finished. The dull enamel has
become as glass. The llstre!ess oxides have
yielded their color, and the tooth that went
Ia Ilab1e and brittle las come out adamant.
But there is an intermediate skill, the acquisf-
tIon Of which Is one of the maryets OF the
mechanic arts. A little too long ir that heat
and the teeth are ruined, and the esils of
..nsderdo"e" a1e equally to be guarded
trained Judgement, q skill Of eye and hand
ling that enables the burner to lend success
to The work Of those who hare gone before
him and at the precise point where shade Of
lafiurc Is inter ruin.
The teeth arc now done and ready for tho
curious, characteristic red wax cards on which
they 60 into the tradc. We have not time to
describe the various minor processes of pre-
pairing color, tiu1es, oxides, etc, nor 70 speak
of the manufacture carried on In onc Of the
large rooms, Of corundum wheels used by the
mechanical dentist In grinding teeth to fit
the plate, neither can VIC stop in the rooms
orn,s md a. combnations ON 70. q dental m n uIposss
nor IN the packing rooms, one Of which Is
used for boxing chairs, spittoons, lhthcs, dcn-
tai cases, and other bulky goods; the other
to the bottling. boxing and labelling of yaEi-
ous chemical and medicinal preparations for
the office, and others for the laboratory Of the
practitioner.
In one Of the rooms anrils were singing
and files at work Cd so1no OF the smaller steel
implements Of the dentist, but these are only
a part Of that branch of the business Of the
houte, which gives exclusive employment to
an extensive mandatory In another part Of
rough come forth in all tie glttering multi
farious forms that send shuddcr through
the observer who looks at the dentists well
al1cd case.
There IS enc other little room which "a
Journalist We cannot afford to pass unnoticcd
c. tn'os, monthly, devoted to the interests
Of the profession. The Dental -Nt1rs Letter, i
quarterly which preceded It, reached Its
twelfth volume, and was followed BY the
ttsmos now In the seventh volume, covering
q period Of nineteen years. The meaning Of
the title Is the intention Of the publisher to
cover the dentists .sorid Of science and prac-
tice. and he has 70 far succeeded In his airu
TINT the Utnfcl Cosmos may, We think, by
common consent, be set down as the most
successful publication devoted to this
specially
Passing now from the manufacturing to the
sales rooms, we dnd great variety and cx-
by the dentist, from the smallest hand impfs-
Ment, to the costliest plush lined chair, With
Its curious JOINTS and Injurious appointments,
aeeocfated, alas, with discomfort and suffering,
but Of that kind ont Of which comes health
and restored beauty.
The processes NC hare described in DR..
Whites establishment, Joined to the employ
ment given In his eales-rooms, packing rooms
and counting grooms, give employment to over
two hundred persons, with pay roll Of be-
tween two and three thousand dollars per
week, and product Of four hundred thou
sand teeth per month. .
and 50 passed the morning at the Arch
street establishment. ~. :
It Is lsnown II dentists Throughout the
world, and for eighteen yeasa has been TAX
Ing On those stages Of progress that likcfts conn
pleted teeth are enaInel1ed securely with the