Part I. Report of progress in 1869, by J. S. Newberry, chief geologist. Part II. Report of progress in the second district, by E. B. Andrews, assist. geologist. Part III. Report on geology of Montgomery County, by Edward Orton, assist. geologist.

REPORT OF THE GEOLOGICAL SURVEY OF OHIO.
SECOND DISTRICT.
To PROF. JOHN S. NEWBERRY, Chief Geologist of Ohio:
SIR: In the organization of the Survey, the Second District was assigned
to me. This District has for its northern boundary the line of the Central
Ohio Railroad; for its eastern and southern, the Ohio river; for its western, the western limits of the Great Black Slate, extending from Columbus to a point on the Ohio river a few miles above Rome, in Adams county.
Nearly twenty-three counties are included within these limits.
I entered at once upon my work. I have had for assistants William G.
Ballantine, A. B., a graduate of Marietta College; Roland D. Irving, of
New Brighton, Staten Island, N. Y., a graduate of the School of Mines
Columbia College, New York City, and Wm. Ward, of Marietta. Each
rendered valuable service. Mr. Ward continued with me about two months,
and rendered me much aid. Mr. Irving remained with me un'til about the
1st of September. His labors were of great service, especially in working out the sections of the Black Slate and Waverly sand-stone, along the
Ohio river, in Adams and Scioto counties. These labors, and those of
Mr. Ward, were none the less efficient, nor less cheerfully given, for being
entirely gratuitous, the State only paying their necessary traveling expenses. Mr. Ballantine received a small remuneration. He remained
with me until after the middle of November. A large number of the sections taken in Perry county and portions of other adjacent counties were
the product of his indefatigable and skillful labor.
GENERAL FEATURES OF THE SECOND DISTRICT.
The surface is generally hilly. The only exception to this is in the
northwestern part of the District, where, in Franklin and Pickaway, and
portions of Fairfield and Licking counties, most of the surface is comparatively level and smooth.
The whole district slopes to the south and southeast, and consequently
the drainage is to the Ohio river.
The Ohio river flows in a long, trough-like depression, made, doubtless,
at the time of the uplifting of the Alleghany mountains. This was subsequent to the formation of the coal measure rocks, as these are lifted up,
and form the summit of the mountains in portions of Pennsylvania and
NOTE.-The delay of this report is due to the Engraver of the Sections. The author
had no opportunity to see the proofs and correct the mistakes.