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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2. From Hillsboro, Highland county-Col. Trimble's Quarry.*
Carbonate of lime.......................... 54.2S
Carbonate of magnesia......... —.... —--- 43.23
Silica...................0.... —........................ 0.40
Alumina and iron (trace)................ 1.80
99.68
3. From Thompson's Quarries, Springfield.
Carbonate of lime.................. 50.90
Carbonate of magnesia....................................... 39.77
Silicates of lime and magnesia............................................ 7.07
Sand.- -.-.~.- -.-...... --.. —. - 1.19
Sand.................................................................... 1.19
Alumina................. 0.70
99.63
4. From Moore's Quarries, below Springfield.
Carbonate of lime.................................................. 46.40
Carbonate of magnesia............................................. 47.53
Silica, iron and alumina-chiefly the last.................................. 4.90
98.83
5. From Cliff Limestone, West Union, Adams county.t
Carbonate of lime....................................................... 42.80
Carbonate of magnesia...................34.79
Silica and sand................... 18.80
Alumina and iron,............................ 2.20
98.59
6. From Bierley's Quarries, Greenville, Darke county.t
Carbonate of lime....................................................... 44.60
Carbonate of magnesia -............... —. —------ 50.11
Silica, iron and alumina-chiefly the last...................... 4.60
99.31
7. From Gard's Quarries, Greenville, Darke county.t
Carbonate of lime.......................... 51.30
Carbonate of magnesia --................................. 45.72
Silica, iron and alumina-chiefly the last................................. 2.20
99.29
8. From Northrup's Quarry, New Madison, Darke county.t
Carbonate of lime............................................. 51.70
Carbonate of magnesia................................................... 45.26
Silica, iron and alumina-chiefly iron.......................... 2.70
99.66
NOTE.-This lime has a very excellent reputation in the region where it is produced. It is said to be the " coolest" lime of this portion of the State.
t This analysis would seem to confirm the suggestion of Dr. Locke, that the rock in
question would yield hydraulic cement.
t Nos. 6 and 7 represent the only quarries in Darke county that have been extensively
worked. The stone is of but little value for building purposes, but the lime obtained
from it is counted excellent. The geological horizon of the three quarries represented
in Nos. 6, 7 and 8 is the same, viz., the upper portion of the Niagara series.