8 Facts relating to certain parts of the state of Ohio. 
ther examination. I have seen some specimens of this gyp- 
sum. It is of the parest kind, in a crystallized form, and al- 
most transparent. 
Red and yellow ochres are found in various places. 
The most extensive bed of red ochre, that has come to my 
knowledge, is five miles above this place, on the Muskingum 
river. It was discovered in digging into the bank, near low 
water mark, to lay the foundations of a mill. The bed is 
four feet in thickness; some of it was used to paint one or 
two doors in the house of Capt. Devoll, the owner of the mill. 
It has stood for several years, and looks equally well with any 
of the imported paintusually called * Spanish brown.” There 
is also a large bed of it on Federal creek, in Athens county. 
It extends entirely across the bed of the creek, and up and 
down it for several rods. It is of so bright a red, that when 
the water is low it can be seen plainly at a considerable dis- 
tance. Some of this ochre, was used, in the early settle- 
ment of Marietta to paint the roofs of one or two houses ; but 
from its not being well prepared, or from some defect in the 
quality of the paint, it did not stand the weather well. Clays 
of various qualities are abundant; some sufficiently white 
for pipes, or the manufacture of “‘ queen’s ware ;” other kinds 
tinged with blue, and to all appearance the same with that 
used for the construction of pots in glass houses. 
Pyrites are found, but more generally in the neighbonrhood 
of coal beds. We have some very clegant ones that are 
found imbedded in clay, in globular crystals, of various sizes 
from a smal] shot toa musket ball, and nearly the colour of 
brass. 
In my observations, in answer to the previous inquiry, I 
neglected to mention that some of those quarries of sandstone 
are of the proper quality for grindstones; within a few years, 
they have become quite an article of commerce; and hun- 
dreds of excellent grindstones are every year sent down the 
Ohio, into the lower part of this state, and to the states bor- 
dering on the river, where they meet with a ready sale, as the 
stone proper for their construction is not common at a con- 
siderable distance down the Ohio. In many of these quar- 
ries the stone is found in strata of a proper thickness for 
grindstones ; so that the stone cutter has but little more to do, 
than to give the stone the circular form, and cut the hole for 
the crank, and his work is completed. 
