History of the Water Supply of the World / arranged in a comprehensive form from eminent authorities, containing a description of the various methods of water supply, pollution and purification of waters, and sanitary effects, with analyses of potable waters, also geology and water strata of Hamilton county, Ohio, statistics of the Ohio river, proposed water supply of Cincinnati.

by Thomas J. Bell

A POSITIVE ROTARY PISTON METER,

ACCURATE, DURABLE AND SIMPLE, HAVING

ONLY ONE WORKING PART.

In this new Meter will be found all the advantages of the best known Meters, and none of their defects. It is a positive displacement measurer. It forms no obstruction to the free flow of water. The dial face is always dry and clean, and the interior structure of brass and hard rubber renders corrosion impossible. We claim that it will register on a finer stream than any other Meter ever made. For Illustrated Circulars, giving testimonials, results of tests, etc., address

NATIONAL METER COMPANY,

SOLE MANUFACTURERS.

JOHN C. KELLEY, President,

51 Chambers Street, New York.

N. B.—METERS FURNISHED OF ALL SIZES, FROM HALF INCH TO TEN INCHES INCLUSIVE.

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