,
constitute a gang of five persons who turn out from 30,000 to 35,000
per day of ten hours. As brick makers' days are from sun to sun, say
twelve working hours per day, during the season, from 46 to 50,000
bricks, per day, may be made by a single machine. This is, however, by
no means the most important feature in the invention.

In the ordinary mode of making bricks, the manufacturer cannot begin
operations for the season, until the spring has so far advanced that
working in wet clay will no longer chill his moulders' hands. On the
same account, he loses also morning hours, until the advance of summer
enables his hands to put in the whole period of daylight. He loses,
also, sometimes days together--from the entire stoppage of his
operations in the rainy weather, which forbids the bricks being put
out to dry. In making press brick, all these difficulties are
obviated. As a theory, operations in this mode can go on throughout
the entire winter, frost never extending into solid clay; but as a
practical business, it can be conveniently carried on two months
earlier and one month later than in the ordinary mode. Pressed brick,
made by these machines, are also stronger than their competitive
article, the last of equal hardness in burning, always giving way
when struck by the pressed bricks, as I have witnessed. Indeed, it
cannot be otherwise, the one being porous and the other as compact as
the enormous pressure employed can make it.

The machine, it must be apparent, offers peculiar advantages in
turning out brick without occupying the ordinary brick yard space
necessary for spreading wet brick out to dry. It affords great economy
in time, owing to its operations being independent of frost or rains.
To every new and thriving place commencing the making of bricks, it
dispenses with the necessity of bringing skilful workmen from other
places--in short, it enables every man to be his own brick-maker.
Under these considerations, I anticipate an extensive sale of these
machines, especially for places at a distance.

=Marble Saw Mills.=

We are informed that a large mill for sawing marble is in course of
erection at Brandon, Vt. The marble in that vicinity is principally of
a beautiful white, and of a fine texture, though not very hard.

=Railroad Locks.=

It is reported that locks for elevating railroad trains, from one
level to another, are coming into successful use in France. It appears
to us to be much behind th