ILLUSTRATIONS.

FIG. 1. Map of Ohio, showing drainage basins.
2. Map of drainage basin of Sandusky River

3. Map of drainage basin of Maumee River

4. Map of drainage basins of Great and Little Miami rivers.

Page.

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5. Map of drainage basin of Muskingum River.

6. Diagram showing discharge of Sandusky River at Mexico in 1898–99. 7. Diagram showing discharge of Sandusky River at Mexico in 1900... 8. Diagram showing discharge of Maumee River at Waterville in 1898-99

9. Diagram showing discharge of Maumee River at Waterville in 1900. 10. Diagram showing discharge of Maumee River at Waterville in 1901 11. Diagram showing discharge of Muskingum River at Eagleport in 1899..

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LETTER OF TRANSMITTAL.

DEPARTMENT OF THE INTERIOR,
UNITED STATES GEOLOGICAL SURVEY,

Washington, D. C., October 8, 1903.

SIR: I have the honor to transmit herewith a manuscript for a Water-Supply paper treating of the four principal drainage areas of the State of Ohio and describing the economic development that has taken place within each.

The greater part of this manuscript was written by the late Benjamin H. Flynn, who for some years prior to his death was employed by the United States Geological Survey as field assistant in charge of stream measurements in the State of Ohio. After the death of Mr. Flynn the manuscript was completed by his widow, Margaret S. Flynn, who for several years had taken an active part in his professional work, especially in connection with his duties as engineer for the Ohio State board of health.

This paper treats of the natural features and development of the areas drained by the Maumee, Sandusky, Miami, and Muskingum rivers and contains valuable data with reference to the flow of these streams and the natural advantages they offer with reference to water power and domestic water supply. Of particular interest is that part of the paper which deals with the early history of the water powers, their general relation to the canal systems of Ohio, and the decline in value that has taken place since the establishment of modern methods of manufacturing, trade, and transportation.

The chapter dealing with public water supplies comprises unusually complete information with reference to the sources, equipment, and value of the systems that were installed during the latter part of the last century.

This paper is one of a proposed series dealing with hydrographic matters in the several States of the Union and showing the advantages that the various river systems offer and the manner in which they have been developed, from an economic standpoint.