WROUGHT IRON BEAMS & GIRDERS

[Illustration: WROUGHT IRON BEAMS & GIRDERS]

THE UNION IRON MILLS, Pittsburgh, Pa., Manufacturers of improved

wrought iron Beams and Girders (patented).

The great fall which has taken place in the prices of Iron, and

especially in Beams used in the construction of FIRE PROOF BUILDINGS,

induces us to call the special attention of Engineers, Architects, and

Builders to the undoubted advantages of now erecting Fire Proof

structures; and by reference to pages 52 & 54 of our Book of Sections--

which will be sent on application to those contemplating the erection

of fire proof buildings--THE COST CAN BE ACCURATELY CALCULATED, the

cost of Insurance avoided, and the serious losses and interruption to

business caused by fire; these and like considerations fully justify

any additional first cost. It is believed, that were owners fully

aware of the small difference which now exists between the use of Wood

and Iron, that in many cases the latter would be adopted.

We shall be pleased to furnish estimates for all the Beams complete,

for any specific structure, so that the difference in cost may at once

be ascertained. Address

CARNEGIE, BROS. & CO., Pittsburgh, Pa.

$5 TO $20 per day at home. Samples worth $5 free.

STINSON & CO., Portland, Me.

LIGHT GRAY IRON CASTINGS to order promptly.

Plain, Bronzed, or Galvanized.

We make a _specialty_ of light work.

LIVINGSTON & CO., Iron Founders, Pittsburgh, Pa.

Scientific American, Vol. XXXVII.—No. 2. [New Series.], July 14, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 147 / 213 题