Suppose you want to make a joint round a lead and iron pipe. First
file the end of your iron pipe as far up as you would shave it if it
were lead, and be sure to file it quite bright and free from grease;
heat your soldering-iron; then, with your spirit-brush, paint the
prepared end of your iron, and with your bit, rub over the pipe plenty
of solder, until the pipe is properly tinned, not forgetting to use
plenty of spirits; this done, you can put your joint together, and
wipe in the usual manner. Caution.--Do not put too much heat on your
iron pipe, either when tinning or making the joint, or the solder will
not take or stand.