New-York tribune., 1903-05-17
COPPER DOOR GA1vAN1o PROCESS BACKED LIGNoLIrH

excelsior which is nothing but waste w99di u.s.
fhougS @ that was not the prime cause of It's adop-
ton ingredient, for II IS the IactTt w res
ent mixture the result of many trlaIs ana ana a. o.
many Mistakes but after chemists eafo W bring the
material up requirements the desred resul
th na component o9en pars determined with nicet
So exact the relations these parts sJ of the
composition-whfch makes for the security or tne ne
the finish The two factors of the perfected slab
the Lignolith for the surface ana the n i1genious
machines-the invention OF Mr Ponlsc1.i,As Pa ans
mixture takes about ten minutes to make, The
Excelsior is then put in mould d5d Py manu- light
angles and one-haf hour afterward the Lignoo3 go5
nf tb reabifv of its set nor of its quckness it
sets in about twentyfour hours and one can tneI
find it necessary to place boards platforms on
the Others those Hsing a m two weeks to permit
OF their centres being removed e +as+ os 700 de-
grees Fahrenheit for four hoqrs-at Columbia Id- G3l
iege. at the instance OF Ihe being scarcely
charred and showing no crack, while the two-inen
eeed Raf RaE Gf 3hro1gh 6 During this highest
on ea le ia may be sucienty
Are resisting to Withstand any temperature 70
and Vet be entirely unsuitable freproofng ma,
terial system Of repr92ng that r rs ne o0y
be sufficiently resisting, but also sufncienty
from being heated to injurious degree The ma
terials usually employed in so-caIled nreproonns
Conductors while the composition used in the
Of heat that moderate
thickness of it prevents the passage OF nearly Ell
The "F2xcelsior' can be sawed or planed. and
d w o99 take 6a oos 9s made Of it. or It can be
The material is generally gwen f ISr ib Wbsre
finished surfaces required. it can be made SO
hard as to resist coarse emery. under pressure
FIREPRooF FLOORS.
Floors Of this composition spanning twenty to
tUgstTdten ffed eens USED IN recent
slab and onesixteenth inches IN tlcA1ess IN afbsS
end detected the centre only SIC Of an 1oaa inch a
three hundred and sixty pounds per square Ter6T 1oGt
and when the burden was removed Il be Seem
that this floor becomes an integral part of the
fSs 9 Of TelIaby strength
non-conductivity and ineombustbity +,s are, ADDED
y1ffns Of being economicai-for imposing less
weight rd iro0 ON to carTy It This together with the
fact that there is great 9ie6ence ta IN Iattsr re-
curing n1a 5s Dsa metal iathng underneath enables
stories of the latter eleven stories OF me
same height-a remarkable economical snowials @ ins
These floors are sanitary models; being seamless
and free OF cracks they cannot naEpOf the
age hreproof foor-a5e easily Kept o IN gf twenty
square feet there viii only be variation in weight
Of some five pounds. each weighing aoouI 5 Nv" ,ar
Se tb wq Which thew can be moulded At render
| them adaptable for great variety of purposes
F1REPRooF STAIRS.
Thus they are ideal for stair eonstructio5nnn
they even be put on o,d rsep Trana and .nosng"
without and seTaass s9Tsrag the into S'a repr6cf
structure adding only yeeghths Of a. an oGh oGh
to to- it he sesD sReofeJ nt Jansens Hof Brau Haus. at
| the instance of Architect Tuthill. undertook tne
work Of covering the h2Sr amo 81 cty hospital
the provision being that the Work sno1 onnossd
so nf BBeevnF t possible to do the
work satisfactorily, but Mr. Tuthill insisted soah- IAN
ing his reputation that tne YincateG his tuds-
| nent CAn equally difficult experiment was the the
coy c6vering s OF in the wills Building No % William
st This covering had TO be renovaole !ov ~ ,;o
| With iron They have given perfect satsIacti"n'
| FIREPRoOF BRIDGES
,r roa,ar,aI makes an ideal roadway for bridges
inspection OF the ssGUn the P World building
Leading up to s The BToe Bses MAS CHOSEN for the
w yesson that during rush hours twenty thou
persons pass over II In an @ e aenosts or,
S s srnds against the floor. it is considered ths
seVerest of all tests-it is weather as wen as q "a
tbst uo if IL would stay there one month II would
stand any praetea test & nam stsirway of the
rneat Hecia Iron Works four treads of this ma
fariel were placed. the remainder OF the treaos a
there some five years, and are WORT 10 .oIr
ears ana the wear is not perceptible- As ns sns
Hecia has about a thousaaGa a sortbto say moth
ing of the great number OF visitors 70 the "oIht
n NAV readily be seen that these stairs get pis''
81 hs use ease with which the slabs be shaped 70
grade and their cSmparaueSg anSs as against sixty