vent of a common, cheap stove, according to the
temperature of the atmosphere in the room in which it is located. The
draught door is a plain iron door, hung by a common hinge joint at the
upper end; and to the front of the hinge is attached a piece of brass
wire, which extends vertically nearly to the top of the room, and is
connected at B to a horizontal brass wire C D. This is the only
apparatus required, but must be so adjusted as to allow the door to be
closed, or nearly so, when the temperature is about right. If the
temperature rises above that point, the horizontal wire will
immediately expand so as to allow the door to close. But as soon as
the temperature begins to fail, the wire contracts and opens the vent.
On this principle the apparatus will readily find a medium, and there
remain, varying only occasionally to accommodate itself to the
variations of the quantity of fuel in the stove. The entire expense of
this apparatus, exclusive of the stove, will not exceed 50 cents. It
is generally conceded that a large portion of cases of colds, coughs,
&c. are occasioned by irregularities of the temperature of
sitting-rooms but with this plan of regulation this evil may tie
avoided without any material expense.

=New Paper Mill.=

Mr. C. C. P. Moses has erected a line brick building, 75 by 38 feet,
three stories high, on the site of the old foundry, at Dover, N. H.,
$12,000 to $15,000. The rooms are constructed and furnished in a
complete manner for carrying on the paper making business in all its
departments. The works are nearly completed, and will be in operation
in five or six weeks.

=New Mill at Lowell.=

The Merrimack Company have in progress of erection the largest mill in
Lowell, and which is calculated to employ from 300 to 400 operatives.
The building is nearly finished, and the machinery is to embrace the
latest improvements in this or any other country.

=Machine Shop.=

A new machine shop is about commencing operation in Norwich: about
half a mile northeast from the railroad depot. The building is 100 by
40 feet, and is calculated to employ 60 hands in the manufacture of
steam engines and manufacturing machinery. The work at this shop will
be finished in the best style and at moderate prices.

=Ornamental Kites.=

[Illustration:]

This month being considered as one of the best for flying kites, we
may indulge our young friends with an article on that subject. The
principle on which