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Expansion Joint and Portland Cement

WE ARE SI'RE WE CIN INTEREST YOU'.

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A. B. KNOWLSON CO.
COAL and

203-207 Powers Theatre Bldg. BUILDING MATERIAL

GRAND RAPIDS, MICH.

CLARENCE W. HUBBELL

M. AM. Soc. C. E.
CONSULTING ENGINEER

Sewerage, Sewage Disposal, Water Supply, Municipal Engineering

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Also Building Brick of All Kinds in Both Clay and Shale.

It is worth your while to direct your inquiries to us.

H. A. HOXIE
PAVING CONTRACTOR

1426 FOURTH ST., N. W.

GRAND RAPIDS, MICH.

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OF EVERY DESCRIPTION-DESIGNED, FABRICATED

AND ERECTED BY

The Whitehead & Kales Iron Works

DETROIT, MICHIGAN

2,500 Tons of Shapes and Plates in Stock.

Geological Survey of Michigan

A catalog of State Survey reporte, publications, and maps with a list of pub-
lications of the U. S. Geological Survey relating to Michigan will be sent upon
request.
Attention is called to recent publications, as follows:

Publication 26, Agaricaceae (Fleshy Fungi) of Michigan.
Publication 27, Mineral Resources of Michigan for 1917.

Publication 28, Drainage in Michigan.
Orders for Topographie Sheets (Joint Survey) and inquiries as to what sheets
are published will receive prompt attention
R. C. ALLEN, State Geologist

LANSING, MICHIGAN

PERRY TESTING LABORATORY Cherry 5375

Foot of Third Street Detroit, Michigan

M. C. R. R. Dock
CHEMISTS AND TESTING ENGINEERS
Specialists on CEMENT TESTING, MUNICIPAL and HIIGIIWAY

materials of construction
Department for the CHEMICAL and BACTERIOLOGICAL examina-

tion of WATER Equipped for general CHEMICAL ANALYSIS and PHYSICAL TESTS

Olsen Universal Testing Machine, 300,000 pounds capacity

Unrivaled for the sterilization

OF

Water Supplies and Sewage

100% PURE

100% EFFICIENT

The improved method under which E. B. G. LIQUID CHLORINE is purified and liquified assures a quality of unvarying reliability-no foreign impurities to gum up your apparatus and put it out of commission.

We invite your inquiries for proof of this statement

ELECTRO BLEACHING GAS CO.

Pioneers and Leading Manufacturers of Liquid Chloride

MAIN OFFICE: 18 East Forty-first Street New York City Plant: Niagara Falls, N. Y.

Chicago Office: 11 South La Salle Street

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Michigan Boiler & Iron Works

SUCCESSORS TO CENTRAL BOILER & SUPPLY CO.

Manufacturers of

MARINE AND STATIONARY BOILERS
TANKS, STACKS AND SHEET IRON WORK

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Prompt Attention Given to Belt Repairing Prompt Service TRY US OUT!

CITZ. Phone 4518 Reliable Material

818 OFFICE AND FACTORY: 1-3 Ionia Ave. S. W.

BELL MAIN

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