6½ miles per hour on a 35½-inch gage track; the slow platform is
31½ inches wide, moves at half speed and runs on a 17-3/4-inch gage
track. The whole structure will be elevated on girders carried by cast
iron columns, with stations about 656 feet apart. The high speed
platform weighs 146 pounds per lineal foot; and with passengers,
nearly 400 pounds per foot. The slow speed platform weighs about half
this. The track will be about 2½ miles long; the initial motive
power is figured at 472 H.P. and the carrying capacity at 38,880 per
hour.

THE "SCHLAMM," or mud, thrown down from the water of coal washing
has hitherto been regarded as worthless, says The Engineering and
Mining Journal, except that sometimes a portion of the coal particles
it contained have been separated and made of value by a washing
process; but Bergassessor Haarmann, of Friedrichsthal, has invented a
new method for treating it dry and dividing it into two products, one
of which, with low ash content, is distinguished by its granular
nature, while the other contains a large proportion of ash and is of
the fineness of flour. The former of these two products is, on account
of its low ash content, useful for various purposes, and the latter
constitutes a fuel quite ready for use in coal dust firing. The method
is founded on the circumstances, hitherto lost sight of, that the
incombustible constituents of the "schlamm" chiefly consist of clay
which was formerly more or less dissolved in the wash water; and on
the mud being dried and subjected to a suitable mechanical process,
the clay falls into fine dust, while the coal particles, on the
contrary, retain their granular nature. The method is carried out by
drying the mud and a subsequent fine sifting, which effects a breaking
up of the lumps that occur in the dried "schlamm," and a separation
into the two products above named. The dust that falls through the