Detroit and Jackson Coal and Mining
Company. The works of this Company are at Woodville station on the
line of the Michigan Central Railroad, about three and a half miles
west of Jackson city.

The mine is situated on the north side of the Railroad and about half
a mile from the main track. The Coal Company have built a side track
from the Central Road to the mouth of their shaft. The shaft from
which the coal is taken is ninety feet deep, and at the bottom passes
through a vein of coal about four feet in thickness. This vein has
been opened in different directions for several hundred feet from the
shaft, and with a tram-road through the different entries the coal is
reached and brought from the rooms to the shaft, and then lifted by
steam to the surface. This coal has been transported to different
points in the State and is rapidly coming into use for all ordinary
purposes, taking the place of many of the Ohio coals and at a reduced
cost. The mine to which reference is made is within _four hours'_ ride
of Detroit, on the Central Road, and a visit of two hours (which can
be accomplished any day, by taking the morning train, leaving the city
at 9 45 and returning so as to reach here at half past six in the
evening,) will repay any one for the trouble. The station is called
Woodville, and is only three and a half miles west of Jackson.

Michigan, hitherto a heavy importer of salt, is in a fair way not only
to have amply sufficient for her own wants, but something perhaps to
spare. To aid in developing our saline resources, the Legislature
wisely provided a bounty upon the production, which has already
brought forth good fruits. At Grand Rapids, salt water has been
discovered much stronger than that of the Syracuse springs, requiring
only twenty-nine gallons to produce a bushel.--Arrangements have been
almost perfected for commencing the manufacture upon a very extensive
scale.

At Saginaw, within a few days, at the depth of 620 feet, copious
volumes of brine were revealed. This is also stronger than any in New
York. From some cause, it is sought to keep this information a secret,
but it is fair to presume it would soon have leaked out. The salt both
at Grand Rapids and Saginaw, is a beautiful article, of great purity.

When Nature formed the Grand River and Saginaw valleys, she seems to
have been engaged in an animated contest with herself. The
developments are such as to warrant the conviction that other and
perhap