XII.   September 16,   i8&9.





mON  AND  METAL WORK.





RECOKD ANU aUIDD.





LEWINSON & JUST,

Consulting Engineers and Contractors.

SPECIALTIES:    Iron  Work for  Buildings,  Foundations.
Expert  Reports,  Examination of Structures.





Téléphone, llS0-3Sth.





128 West 42d Street, New York.





BRONZE   CHEAPER   THAN   WOOD!





Cftonot Im mArr*i «r brokvB.
NKllDei   IO  POL.I<tBlNCl.

Wlll   oitdlta   nature Ir   to   k   fin*  stAttiu?

brome color.
Notbfng M> eleKant.

Oet Ont Pricea on CKitinga aud

lllpeciiil  Work.

Send Postal Caid, or 'Pbone.

Manhanan Brsss Co.

338 East 28th street.







JACKSON ARCHITECTURAL IRON WORKS,





J'oundries aud ShopB, East 2Bth and 29th Streets;
Oface, 316 East asth Street.





All  Kinds of  Iron,   Bronze  and   Brass   Work  for  Buildings,   Improved
Stable  Fittings  and   Fixtures.





Wa wlll be pleased to fnrniah Estlmatea of Cost or Designs.





Téléphone, 2009—SSth.





HECLA  IRON WORKS,





Forme H y...

POULSON & EGER.





Offi'.e, Showrooma and Works:
North llth and Berry Sta., Brooklya, N. T.





Iron Stairs, Elevator Enclosurcs and Cars, Railings, etc.
Bower-Barff and Electro-PlaCe Finishes.    .





Architectural and Ornamental Iron and Bronze Work.

The Prince &  Kinkel Iron Works,

Téléphone. i324-38th.                        553, 555 & 557 West 33d Street.

CONSTRUCTION AND ORNAMENTAL DEPARTMENTS.

STEEL BEAMS.—All Sizes Carried in Stock.





jno. Williams.  J.  Mitchell,
Jaa. "Willianis.

Architectural,

Ornamental,

ËcJesiastIcal





B. Stiilman, Associate.

Wrought  Iron   Dept,





JNO. WILLIAMS,

Bronze, Brass andWrought Iron,





Foundry and Works,   544  tO  556  West  27th   St., N.Y.





Tel.  212-18th  St.





LEVERINQ   &   GARRIGUES,

ARCHITECTURAL  IRON  WORK.

552 & 554 West 23d Street, New York.





POST & HcCORD,





Main Office and Works;                   StCCl    attd     IrOH     ConstrUCtïOIl,

Paidge Ave., Dupont and Setauket Streets,
C                     Brooklyn.





Buildings, Roofs and Bridges.





JOHN JORDIS,                  Architectural and

430 & 432 East IlOth st., New York. Omameiital Ifûî! Work

Stairs and Elevator EnHosures a Specialty.                         fOr    DUllQlII^S.

Record & Guide Press.

FINE  BOOK, JOB AND COMMERCIAL PRINTING.

227   WILLIAM   STREET.











Portable and Brick f iSt Pumaces
that wlll give Heat ani. savo Coal.
Estimâtes given.

IRA G. LANE,

307 E. «4tb 5t.,       New Yorlc.





HARLEM  IRON   WORKS,

IroQ Work of All Kinds for BuildinES,
Fire-P.scapes, Raïlïngs, Awnings, etc.

OSCAR Q, BQRKÇTRQM, 403 E. lOSth St., h, Y.





Smokeless Pires.—The Berlin correspond¬
ent of the ■■Times" has given some partie¬
ulars of a new invention by one Cari Weg¬
ener, which has for its object the élimina¬
tion of smolie from a furnace, accom¬
panied by a notable saving in the con¬
sumption of coal. This invention, we are
told, is shortly to be brought hefore the
British public in the form of the usual
limited company. The success of the Sys¬
tem dépends upon feeding the furnace
with powdered coal, instead of the "well-
screeneà" lumps which hâve hitherto been
regarded as the most advantageous form
of such fuel. The coal-dust is fed into the
flre from a container in front by means of
a tube, which terminâtes in a revolving
sieve. This sieve is kept in motion by the
draught, and has the effect of scattering
the fuel over the furnace in such a way
that it is at once inflamed without smoke
and with very little ash, Coal of compar¬
atively low Quality can be economically
used in this powdered form, and the only
drawback to the process seems to be the
necessity for using a separate machine for
the grinding of the coal to powder. On
the other hand, the slack or dust which
forms a necessary by-product of the coal
industry will flnd hère a field for employ¬
ment which will be much appreciated by
owners of mines and merchants gener¬
ally.—Chamber's Journal.





VjSs for Liquid Air.—By means of liquid
air the effect of température upon metals
can be studied with ease, and it is seen
that température has a great deal to do
with ductility, tenacity and hardness.
When subjected to very low températures
the colors of many substances change,
and some of the most brilliantiy colored
salts become nearly white when brought
to the température of —191 degrees C.
Ag-ain, it has become possible to test the
theory of the electrical conductivity of
metais at very low températures, and to
verify the laws which, hefore, were largeiy
based upon theoretical considération': and
tests between comparatively high limits.
All thèse, however, are laboratofy exp ri-
ments. But would not any one of them
iustify the thought and work which hâve
been devoted to the production of liquid
air? In the line of the practical applica¬
tion of liquid air little has been done, but
the possibilities seem great. When drawn
trom the machine the liquid is composed
of a mechanical mixture of oxygen and ni-
trogen in the proportions of about 1 to 5,
As the hoiling point of the oxygen is
slightly higher than of nitrogen, the latter
évaporâtes first, and after a few hours
exposure the remaining liquid contains
about 75 per oent. of oxygen. There seems
to be no reason why this liquid should not
be expanded into cylinders, and then uï=ed
for the oxy-hydrogen light and other com¬
mercial purposes, where it would compare
very favorably in purity with gas now
prepared by chemical action. As a ré¬
frigérant the liquid wil! probably hâve a
wide field, lhe apparatus for its prépara¬
tion being very simple and reciuiring little
attention. îts use as a means of trans-
ferring energy has been from the first
one of the problems to be worked out, and
while nothing deflnite has been determined
in this line, yet it is believed by persons
who are as capable of giving a judgment
as any that the day is not far off when
smali motors such as are now used for
driving street cars and light machinery
will be run by the boiling of liquid air.—
American Machinist.





'





Tensile Tests at High Températures.—
Some interesting experiments hâve been
made at the Royal Technical Instltute at
Charlottenberg on the effect of heat on
the physical properties of certain metals.
The materials tested included iron, open-