there is a small hole in the
pot, drive a copper rivet in it, and then solder over it with
this cement.

The Best Method of Rendering Basement Walls Damp-Proof.--Construct on
the outside an area wall so that the earth does not rest directly
against the main wall of the house, but only against the outside wall or
casing of the area. To form such an area, build a wall half or one brick
thick parallel to and some 2 or 3 inches from the main wall, and form at
the bottom a channel or gutter connected with the drains, so that any
moisture or water finding its way in through the outer casing may be
conducted away and will not therefore penetrate into the building.
Thoroughly ventilate the areas by means of air bricks or other suitable
connections with the outer air, and connect with one another by making
through connections underneath the floor joists. Be very careful that
the main wall is laid on a good and efficient damp course. The top of
the space between the area and main walls may be covered in all around
the building with bricks--ornamented or otherwise, as preferred--on a
line just above the ground. Another plan of effecting the same object is
to dispense with the area wall and in building the brick work to cover
the whole of the work on the outside with a thick layer of bituminous
asphalt. The plaster on the inside is in this case often rendered in
nearly neat Portland cement.

How to Caseharden Large Pieces of Steel.--A box of cast or wrought
iron should be provided large enough to hold one or two of the pieces,
with sufficient room all around to pack well with the casehardening
materials, which may be leather scrap, hoof shavings, or horn
shavings, slightly burned and pulverized, which may be mixed with
an equal quantity of pulverized charcoal. Pack the pieces to be
casehardened in the iron box so as not to touch each other or the box.
Put an iron cover on the box and lute with clay. Heat gradually in
a furnace to a full red, keep at an even temperature for from 2 to
4 hours, raise the heat to a cherry red during the last hour, then
remove the cover and take out the pieces and plunge endwise vertically
in water at shop temperature; 2 per cent. of hydrochloric acid in the
water improves its tempering qualities and gives the metal an even
gray color.

A Good and Cheap Preparation to Put on Friction Matches.--The igniting
composition varies with different makers. The following recipes may
be taken as fairly repres