THE LACUSTRINE OR LAKE CLAYS.

tempered in a pug mill connected with the brick machine.
The brick are made in a Sword machine, dried in hacks on
the yard, and burned in scove kilns. The capacity of the
dry yard is 225,000 and the kiln capacity is about 2,000,000.
It requires six days to burn the brick and one-third of a
cord of wood is consumed for each thousand brick burned.
The brick have a white or cream color.
This yard was opened in 1891 and has been operated
each year since that time, with the exception of 1895, 1896,
and 1897. In 1898 the output was about one million brick.
In 1899 the brick sold at an average of $5. 50 per M. kiln
run.
NEW LONDON.
Throughout the valley of the Wolf River from Lake
Winnebago to Shawano there are extensive deposits of
clay of the same character as those which occur in the Fox
River valley. Between New London and a point several
miles north of Shiocton there are numerous exposures of
clay along the river banks.
Two brick yards are now operated near New London.
One is owned by August Prahl and the other by Frederick
Zerrenner and Son.
Prahl's Brick Yard is east of New London, south of the
Embarass River, and one-fourth of a mile north of the
Green Bay and Western railroad. The clay is reported to
have a depth of over one hundred feet, although it is now
worked to a depth of only six feet. The clay at the sur-
face for a depth of two feet burns red while that under-
neath burns white. When the two clays are mixed togeth-
er they burn a cream color.  The clay is pugged and
moulded in a Wellington soft mud machine. The brick are
dried in hacks on the yard and burned in scove kilns.
The total kiln capacity is 300,000.  It requires eight
days to burn the brick, and a little over one-third of a
cord  of wood is consumed   for each thousand  brick
burned.

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