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.

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1EV. H. HERTZER, ANDREW SHERWOOD,
M. C. READ, R. D. IRVING,
FREDERICK PRIME, Jr., W. A. HOOKER,
W. P. BALLANTINE, W. B. POTTER,
G. K. GILBERT, HENRY NEWTON,
H. A. WHITING.
Of these Mr. Hertzer, who had been for many years a diligent student
of Ohio geology and had discovered the most interesting series of fossil'
remains yet found within our territory-was paid from the salary of the
Chief Geologist, as a compensation to the State for any time devoted by
him to other duties. Mr. Prime, a graduate of the School of Mines of
Freiberg in Saxony, was engaged for three months, at $50 per month.
Mr. Read, who had also had considerable geological experience, was paid
$100, and Mr. Ballantine $50 per month, during the season when field
work was practicable. Of the other members of the corps, Messrs. Gilbert and Sherwood were geologists who had devoted much time to practical geology in New York and Pennsylvania, and who, for the purpose of
adding to their experience, volunteered their. services for no other compensation than their traveling expenses. The five remaining names on
the list are those of graduates of the School of Mines of Columbia College,
who brought to our work a thorough preparation in chemistry, mineralogy
and metallurgy, and who also gave their services during the summer,
with no other compensation than their expenses.
The law providing for the Geological Survey requires a careful agricultural survey to be made, and as Mr. Klippart, one of the Assistant
Geologists appointed by the Legislature, had for many years devoted
himself to the study of agriculture, and since 1856 had filled the position
of Secretary of the State Board of Aticulture, the agricultural department was committed to him.
The purely chemical work of the Survey, a most important department, was committed to Prof. T. G. Wormley, of Columbus, one of the
best chemists in the country.
The law authorizing the Geological Survey provides that such survey
should begin on the first of June, 1869, " or as soon thereafter as practicable." In accordance with this provision, the members of the Geological Corps entered upon their duties at this date.
The first duty required by law of the Geological Corps was the accurate determination of the geological structure of Ohio. This was a necessary prerequisite to all the subsequent work of the Survey. During the
many years that had passed since the former Board was disbanded, geological surveys had been maintained, with more or less thoroughness, in
New York, Pennsylvania, Kentucky, Indiana, Illinois, Missouri, Arkansas, Kansas, Iowa, Wisconsin, Michigan and Canada, and the observa