Sole American Builders of the
Standard Double Superheater
Lowe Water Gas Apparatus.

System for Controlling Air and
Steam Supply to Water Gas
Apparatus.

Waste Heat Boilers for Water
Gas and Coal Gas Appa-

ratus.

Vertical Retort System.

Tar Extractors for Carburetted Water Gas.

Gas Analysis Apparatus.
Hygrometers.

Photometrical Apparatus.

First Aid Kits for Gas
Asphyxiation.

First Aid Kits for Electric
Shocks.

First Aid General Wall
Cabinet.

Your courtesy in mentioning the Journal will be appreciated

A SIMPLE METHOD OF SECURING DUSTLESS CONCRETE FLOORS. By P. M. BRUNER.

A limited number of copies of the following reprints from the Journal are still in stock:

"The Application of Scientific Management in Railway Operation," by W. E. Symons, with a full discussion by Burns, Emerson, Gilbreth, and others. 159 pages, illustrations, plates. Paper binding, 75 cts.

"The Railway Tunnels of New York City," by Alfred Noble. 41 pages, illustrations, folding plates. Paper binding, 25 cts.

Address orders:

The Actuary,

The Franklin Institute,

Philadelphia, Pa.

Your courtesy in mentioning the Journal will be appreciated

χχίν

If it isn't ELECTRIC

It isn't MODERN

Any Consulting Engineer who specifies
the installation of a private plant before
thoroughly investigating the economy of
Philadelphia Electric Service is deliberately
sacrificing his client's interests. If you are
designing any properties requiring Electric
service, send for us NOW!

CYRUS BORGNER COMPANY, SUCCESSORS TO

BORGNER & O'BRIEN

239 ST. ABOVE RACE PHILADAPA

FIRE BRICK

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FIDELITY TRUST COMPANY

Nos. 325-331 CHESTNUT ST.

Nos. 43-53 SOUTH FOURTH ST.

Capital and Surplus, $15,000,000

Pays Interest on Deposits.

Safes for Rent in Burglar-proof Vaults.

Executes Trusts of Every Description.

Securities and Valuables Taken for Safe Keeping.

Wills Safely Kept Without Charge.

TARR
YSTEM OF

EWAGE DISPOSAL

SIGNS

HASSELBERG BROS.

1004 Moravian Street

roth and Walnut PHILADELPHIA

SAMUEL P. SADTLER & SON

Consulting Chemical Experts

Analyses and reports made in all branches of industrial and applied chemistry. Expert assistance in the development of chemical processes and patents, and preparation of testimony in chemical patent suits. Raw materials and waste products of manufacturing processes specially studied and reported upon.

Office and Laboratory-39 S. 10th St., Phila.
Experimental Shop-Chestnut Hill, Pa.

Will dispose of sewage in a sanitary, odorless and efficient manner at a cost for maintenance of 90% less than any other system and 100% EFFICIENCY. Endorsements by leading scientific men and various Health Boards on file for your inspection.

GREEN-STARR ENGINEERING CO.

Civil and Sanitary Engineers

PERRY BUILDING, PHILADELPHIA, PA.

Your courtesy in mentioning the Journal will be appreciated