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Pronunciation of Foreign Languages, 118. Applications of Electricity, 153. Decomposition of

Nitrates by Decomposition in the Dark, 153. Phosphor-Tin, 154. Relations of Intensity in the
Sodium Lines, 154. The Brin Process for Oxygen, 154. Bronzing Copper, 155. Chinese
Acoustics, 165. Conservation of Electricity, 155. Inverse Electro-motive Force. 155. Magnetic
latensity of Iron, 156. Velocity of Light in Quart

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Principal Office, 119 South Fourth Street, Philadelphia.

Branch Office, 605 Seventh St., Washington, D.C.

Authors of “The American Patent System," “Our Country's Debt to Patents," “Answers to Questions of the State Department Relating to Patents." Also,

of a “Brief Treatise on Patents," published by Porter & Coates. Jan. , 1 yr.

RUDOLPH M. HUNTER, M.E., C.E.,

CONSULTING ENGINEER AND SOLICITOR

-OF

UNITED STATES & FOREIGN

PATENTS

Expert in the Trial of Patent Causes.

Machinery Designed and Working Drawings Prepared.

Examinations in regard to the validity and Infringement of Patents.

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Cane Mills, Defecators, Single, Double or Triple
Effect Vacuum Pans, Centrifugals, Bone Black
Kilns, etc.

GAS APPARATUS.

Morton Patent Self-Sealing Mouth Pieces and
Lids, Bench Castings, Purifiers, Condensers, Scrub-
bers, Exhausters, Governors, Patent Dry Centre
Valves, By-Pass Valves, etc.

ROTARY FANS.

For Ventilation of Buildings and Mines. HYDRAULIC ELEVATORS,

For Passenger or Freight Service, of improved construction, combining economy of space occupied and power used,

jude *81 6m

Water-Tube Steam Boiler

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WATER-TUBE STEAM BOILER

Centennial Exposition Medal awarded this Boiler for Highest

Economy and Efficiency on Test.

The following are a few of the parties having these Boilers in use in large lots :

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Singer Manufacturing Company, New York, 19 orders, 3441 H. P. Harrison, Havemeyer & Co., Philadelphia, 6 orders, 3790 Decastro & Donner Sugar Refining Co., Brooklyn, 6 orders, 2980 Matthiessen & Weichers, Jersey City, 4 orders,

3500 Brooklyn Sugar Refining Company, Brooklyn, 2 orders, 1500 Milwaukee Steam Supply Company.

500 M. Grambrill & Co., Cotton Mills, Wilmington, Del., 500 Boston Sugar Refinery, Boston, Mass.,

1000 Raritan Woolen Mills, Raritan, N. J., 4 orders,

1426 The Jessup & Moore Paper Co., Wilmington, Del., 3 orders 1350 American Grape. Sugar Company, Buffalo, N. Y., 4 orders, 4600 Erie Elevator, Jersey City, 1 order,

500 Standard Oil Refinery, New York, 2 orders,

600 North Bend Plantation, Louisiana, 2 orders,

400 South Bend Iron Works, South Bend, Ind., 2 orders,

450 Edison Electric Light Company, New York, 3 orders, 300 U. S. Electric Light Company, New York, 3 orders,

733

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And hundreds of others in all kinds of business from 50 to 1000 H. P. each.

Illustrated Circulars and other information desired furnished promptly.

The Babcock & Wilcox Co.

48 S. Canal St., Chicago.

32 N. 5ta St., Philad'a, 30 CORTLANDT ST., NEW YORK.

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