New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1875-09-10
UTILIZATION OF STAG.
ADDRESS BY y. A. LUCKENBACH BEFORE THE
SOCIETY OF ENGINEERING.

SOCIETY OF ENGINEERING.
Frederick A. Luckenbach addressed the New
York Society o Practical Engineering their session in
Room No. a. Cooper Union last evening" The speakers
TOPIC was The Industrial Uses Of Blast Furnace Stag,
and illustrated by the exhibition Of specimens. The
subject was further discussed by Prof whitney, the
President of the Society and by Messrs Moore, Sutton
Roosevelt and Others. The main points OF Ms Lucken-
bachs paper are az follows:
Stag is u chemical compound. the combination Of an
acid with various bases, and much salt tho sui
pLate of alumina pOtassa Its formation IL strictly
governed by tire laws Of chemistry. The silica Is the
acid and the lime, alrmns, nancsia and the akalies
the bases. Iron generally silcious II when
placed in blast furnace and smeted base Is
ron combine with 1t and carry 1t OIL s Stag 10 prevent
t silica rs Of
saturate another quantity Of maenesia and another OF
sleir chemical equivaIents Having then analyses
or all tho material OF tine charge, the proportions
Stag but with stag with other chemical compounds
there may be two atoms Of base to one OF acid two Of
acid to Of base Of base to one Of acid and
According this is the they called basic acid
neu! slass The acid ags arc the most fusible the
tunes. according to the proportions OF its component
parts material easily fslbe and possessed Of other
definite qualities, and at other times comparatively In
fusDle material bdch being the character Of the pro-
duct 1t has been probem OF great dculty to deter
mine what general system can hit upon which for any
given purpose will utilize all the different varieties Of
Stag.
Tue first recorded plan for the utilization Of Stag
that of John Payne In England, In 1928. He proposed
noiIg tie druss by fIising melting with such mix
lures rs will prevent Its being brittle, and also give 1t
different colOrs, to make t ornamental and
usclAl After this MOshets plan Of 1915, for
working Stag TO obtain the iron left In It. Then Craw
shay and nOshet invented process for recovering tho
iron believed to exist In the refuse VI copper smelling
which process appears To BIS the first or water for
pulverizng molten Stag. In 1882 Alexander Cunning
haD claimed that sulphate ~ alumna aud alum could
De- Obtained from Stag. In 1853. William and John Long
aId thought blast furnace Stag could be formed into
snapes suitable for payements of streets In
the Same year George Robinson proposed .
new PLAN. The Stag was to be run In .
molten state upon heated iron table and
formed into sleetsb by rolling Tho plates were then TO
be annealel and applied for roofing and other pur-
poses Ia tho following year Smith, Bessemer Longs
DO Turned Into table tops chimney pieces stauee, ctc
Joseph Woodland OF Yorkshire patented . process for
making bricks Of Stag for building purposes company
Of capitalists have lately began 10 make bricks Dy this
process Their prospccus asserts that the brick will
withstand force OF over four tons per cubic
ncn being Ave times than ordinary brick Will
All these proects have proved failures. Tue secret VI
ACQUIRING homogoney In structure, irrespective OF oheIni
Cal composition, not discovered, although the prAo-
uce Of anneang gave faint and shud0wy hint Ut tue
direction In which IL might be found. SIR. Luckenbach
read the details VI an invention Of his own which ho
claimed tn Do al Improvement 10 the means Of snnoaing
castings made OF blast furnace Stag, ana wlcn de-
signed TO provide for tho Manufacture Of paving aud
building blocks, brick. and other articles from the
alag.