_Sixth_, use the catch cloth and ladle.

_Seventh_, keep the top edge covered with hot solder.

_Eighth_, wipe the top edge first.

_Ninth_, make a slim joint.

_Tenth_, steady the work with the free hand.

STOP COCK

MATERIALS REQUIRED.--The materials used for this joint are as
follows: two pieces of 5/8-inch extra strong lead pipe 9 inches
long, each; one 1/2-inch plug stop cock for lead pipe; paste and
paper; solder; 1/2 and 1/2 solder; rosin; catch pan and supports.

[Illustration: FIG. 28.]

TOOLS NECESSARY.--The tools necessary for this job are as follows:
saw, rasp, file, turn plug, shave hook, bending irons, hammer,
ladle, soldering iron, and wiping cloths.

PREPARATION.--There are two joints to be wiped on this job and the
stop cock is supported only by the rigid fitting of the lead pipe.
Therefore the preparation must be thoroughly done. The brass stop
will be prepared first.

_Brass._--The two ends of the stop cock are filed bright, then
papered and tinned. This operation is the same, only on a smaller
scale, as the tinning of the 2-inch and the 4-inch brass ferrule.
The paper is pasted over the entire stop cock, except the two ends,
which are tinned for about 1-1/4 inches.

_Lead Pipe._--After the lead pipe has been cut off from the coil,
the ends are squared with the rasp. One end of each piece is reamed
out a little with the tap borer and spread a trifle with the turn
pin. With the rasp, take off the outside edge of the end that has
been spread. The sketch will show this and give the angle at which
the edge is to be rasped. The stop cock is now fitted into the lead
pipe. The brass should enter at least 1/4 inch, then the lead is
beaten against the brass until a tight joint is made. The other end
of the brass stop is fitted into the other piece of the lead pipe
and a perfect fit is made. The fitting of these two joints must be
rigid as upon them depends the stability of the joint support. When
these ends of the lead pipe have been fitted, the pipe is cleaned
with the shave hook and paper is pasted on, allowing 1-1/2 inches
for the joint. Both pieces of pipe are prepared at the same time as
both ends are wiped at the same time.

SUPPORTING.--The three pieces of pipe should be so wedged together
that they will not fall apart when put in position for wiping. The
bricks for supporting the pipe are placed the same as in the
support of the horizontal round joint. The lea